Amid U.S. involvement in a war against Iran, President Donald J. Trump has decided to double down on previous public expressions of disregard and distrust toward NATO. President Trump has threatened to withdraw the United States from NATO several times since his reelection. His repeated jibes at the alliance have raised concern among European defense experts and government officials. Former U.S. Ambassador to NATO Ivo Daalder recently noted that “It’s hard to see how any European country will now be able and willing to trust the United States to come to its defense.” And French President Macron indicated on April 2nd that, in his view, U.S. President Trump was undermining NATO through his repeated threats to withdraw from the alliance. Raising new fears of American abandonment on the part of European leaders, Trump, in various interviews and social media posts within a few days, said that the United States “will remember” France’s refusal to assist in the war against Iran; that NATO was a “paper tiger”; and that “Putin knows that, too, by the way.”

The most recent Presidential broadsides against NATO reflected Trump’s frustration with European allies who chose not to involve themselves in the war against Iran and/or denied their political and military support for the actions taken under Operation EPIC FURY—an effort that Secretary of War, Hegseth describes as “laser-focused [to] destroy Iranian offensive missiles, destroy Iranian missile production, destroy their navy and other security infrastructure – and they will never have nuclear weapons.” But this hesitancy among European allies should not have surprised U.S. leadership. Neither NATO as an alliance nor individual European governments were consulted before the decision to go to war, nor were they fully informed until the operation was already in progress. Further to the issue of NATO support, Trump’s address to the nation on April 1st simply assumed that the United States would wind up its military operations within several weeks and would turn the problem of unblocking shipping in the Strait of Hormuz over to European countries and others. In addition, Western European governments have strong public support for putting distance between themselves and the war in Iran. Popular majorities in every country oppose the U.S. and Israeli campaign, and European opposition to the war is enhanced by Trump’s personal unpopularity on that side of the Atlantic.

An additional element in the split between Trump and NATO was the Russian interpretation of its implications for the war in Ukraine, and more broadly, for Russia’s national security strategy writ large. Prolonged U.S. commitment to war in the Middle East could deplete the availability of military assets that would otherwise be available to sustain Ukrainian forces in their fight against Russia. The global spike in gas and oil prices was an obvious boon to the Russian economy and, from the standpoint of Ukrainian President Volodymyr Zelensky, an unwelcome distraction for European leaders from the priority of supporting Ukraine. Russia also took advantage of Epic Fury to reinforce its support for Iran by providing targeting information for Iranian missile attacks against Israel and other regional states. Russia and Iran had already been sharing technology and knowledge with respect to drone warfare even prior to the launch of military operations against Tehran.

To some extent, the volatility in the Trump administration’s approach to NATO reflected the President’s frustration at his inability to broker a peace agreement between Ukraine and Russia. Vladimir Putin viewed Russia’s war as existential and refused to acknowledge that there was any distinction between Ukrainian and Russian civilizations, let alone sovereignties. The Ukrainians responded in kind, resisting Russia’s invasion and occupation of Ukrainian territory with creative use of drone technology and edgy defensive strategizing that put at risk a variety of targets in Russian territory, including bomber bases and critical infrastructure. Worse for Putin, his invasion in 2022, preceded by Russia’s annexation of Crimea in 2014, refocused NATO on its primary mission of deterrence and defense in Europe as opposed to “out of the area” operations such as Iraq and Afghanistan. Even the formerly Cold War neutral states, Sweden and Finland, were added to NATO’s membership because of Russia’s attempted coup de main against Kiev that turned into the longest and most destructive war in Europe since World War II. Caught in a trap of his own making, Putin continued to pour troops and material into the battlefields of Donbas and elsewhere in eastern Ukraine to support a more favorable negotiating position, should productive negotiations ever materialize.

Given Trump’s propensity for rearranging the deck chairs on foreign policy via Truth Social memoranda, it is conceivable that he will tone down the anti–NATO rhetoric once he has decided on a strategy for winding down the U.S. military campaign in Iran. The process of deconflicting the Strait of Hormuz will likely involve participation from European nations and other countries. Almost nobody benefits from continued bottlenecks in global shipping of oil and other vital commodities. Regardless of the outcome in Iran, the United States needs NATO, and NATO needs the United States. Without the U.S. as the indispensable leading partner, NATO Europe has insufficient nuclear or conventional deterrence against further Russian aggression. This assertion implies no disregard for the steps that the U.S. European allies have already taken since 2022 to improve the quality of their armed forces and military–industrial complexes. It is instead a recognition that the unique American nuclear deterrent and conventional war-fighting capabilities, supported by European determination to resist further Russian aggression, create a global as well as a regional deterrent for Russia and its partners (The CRINKs – China, Russia, Iran, and North Korea) that benefits not only NATO but also world peace. On the other hand, a divided and internally fractious NATO invites further aggression within and beyond Europe.

Stephen J. Cimbala is Distinguished Professor of Political Science at Penn State Brandywine and the author of numerous works on nuclear deterrence, arms control, and military strategy. He is a senior fellow at NIDS and a recent contributor to the Routledge Handbook of Soviet and Russian Military Studies edited by Dr. Alexander Hill (Routledge: 2025). The views of the author are his own.

Trumping NATO was originally published on Global Security Review.

Today, the international security environment is anything but stable, certain, and peaceful. And the future is trending in the wrong direction for the United States and its allies. American strategic force posture must be rebalanced. The US needs a policy of strategic sufficiency 2.0 with new regional nuclear triads as its centerpiece.

Those who favor a rules-based construct of international relations now face the specter of broad and catastrophic threats from a new axis of authoritarianism. This axis is a political union comprised of authoritarian China, Iran, North Korea, and Russia, each guilty of intense human rights abuses of their own people. They seek to create a new world order of control, coercion, and, when needed, armed conflict where they reap the benefits. This new political union could include aggression against the US and its allies simultaneously.

Their military prowess is greatly increasing, through a nuclear arms race that the United States is passively observing. Most importantly, this includes theater nuclear forces of short-, medium-, and intermediate-range missiles in the Pacific and Europe. Today, the US simply has no theater range nuclear forces forward-deployed to the Pacific. According to the Congressional Research Service, all American nonstrategic nuclear weapons are either forward-deployed with aircraft in Europe or stored in the United States. Further, with Russia possessing as many as 2,000 nonstrategic nuclear weapons in its arsenal, the US and NATO are outpaced in theater nuclear forces in Europe by perhaps a 10-to-1 margin.

Unlike the Cold War, these threats are undergirded by China’s economic power, ironically fueled for decades by liberal societies enamored with China’s cheap product and labor. It is meaningless to characterize the American relationship with these regimes as competition. The United States and its allies are in conflict with them, not yet armed conflict, but conflict, nonetheless.

The US has four broad policy choices for its strategic force posture. First, it can stay within guidance of the 2022 Nuclear Posture Review (NPR) and slowly modernize the strategic nuclear triad while reducing reliance on nuclear weapons hoping adversaries follow. However, every nuclear-armed adversary is deepening reliance on nuclear weapons and expanding nuclear forces, with no signs of stopping.

Second, the US can seek an isolationist foreign policy and aid its allies in developing and deploying their own nuclear capabilities. This option requires that the US all but abandon its policy of extended deterrence and the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), placing regional security in peril and fostering geopolitical atrophy.

Third, it can promote new security architectures in Europe and the Pacific, where a leading regional ally would assume responsibility for providing the needed “nuclear umbrella” over fellow regional allies. This option is likely unworkable.

The fourth option is for the US to embrace its historical leadership role, strengthen its strategic force posture, and, working with Allies, reconstitute regional conventional defenses. The last option is the only prudent one to prevent conflict through deterrence against multiple adversaries for the foreseeable future. The logic of such a strategy should start with President Richard Nixon’s approach.

In the late 1960s, Nixon formulated a realist policy of “strategic sufficiency.” It was designed to adjust the American strategic force posture to the threats, uncertainties, and instability of that time. Such threats included rapid growth in Soviet nuclear forces and the prospect of simultaneous armed conflict with multiple nuclear-armed adversaries. Nixon concluded strategic balance was essential for overall security, though it meant expanding the American nuclear forces immediately. Quantity was a quality all its own. If numbers mattered to the Soviets, then the United States needed to include them in sufficiency assessments.

In his first annual foreign policy report to Congress, Nixon argued strategic sufficiency required a military calculation of forces for warfighting, but explicitly argued sufficiency’s core idea was political. Forces could only be sufficient if they accounted for vital and long-term American security interests and aspirations, including the protection of global commercial markets.

Combined, the military and political features of Nixon’s sufficiency enabled the US strategic force posture to accomplish a wide set of policy goals. These included deterring the Soviets, assuring allies, countering coercion, providing a president political bargaining power to successfully wage an escalatory battle, fight and finish war on multiple fronts, and safeguard long-term interests.

To rebalance the force, the Nixon administration moved to upload nuclear missiles with multiple independently targetable reentry vehicles (MIRV) to be able to attack more targets and overcome enemy defenses without reliance on a launch-on-warning strategy. Nixon also hardened intercontinental ballistic missile (ICBM) silos, increased the mobility of forces, and increased air and missile defenses. Nixon coupled American security to allied security but demanded more of allies especially for conventional forces to deter regional aggression. Such was the logic and choices of Nixon’s policy.

However, Nixon’s sufficiency policy was formed in the 1960s, in an era when large or surprise Soviet nuclear attack was feared. It focused on American strategic nuclear forces that provide central deterrence of attacks on the homeland. Today, the most likely pathway to nuclear escalation and attacks on the homeland is through regional conflict, where adversaries have a significant and growing theater nuclear advantage, particularly in sub-intercontinental-range missiles. Allies are faced with direct and immediate threats of aggression and nuclear attacks. The United States nuclear triad of strategic systems is neither designed nor credible for waging regional nuclear war and escalation. It invites nuclear retaliation on the homeland.

Therefore, a strategic sufficiency 2.0 for the future must include nuclear forces necessary to satisfy Nixon’s military-political goals, but with a focus on the theater. Beefing up the American strategic nuclear triad is important, but so is expanding regional conventional forces and homeland defenses. However, the greatest deterrence priority for this new axis of authoritarianism is building American theater nuclear triads.

Adversaries calculate the totality of war and the risks of escalation all the way through war termination prior to making the initial decision to wage war. And so, the strategic force posture must have the forces in place to succeed at every step of conventional and nuclear war in order to deter war. Regional nuclear triads plug the greatest force sufficiency gap in this spectrum.

Regional nuclear triads would create a deterrent wall between regional conventional conflict and escalation to strategic nuclear conflict against the homeland. Today, such walls are virtually nonexistent. Regional nuclear triads in Europe and the Pacific would be sufficient to provide the president a wide range of theater options to counter simultaneous axis escalation threats, without having to move forces from one region to the other. Such diverse options enable a president to successfully wage the regional escalation battle without using the strategic triad. To use the strategic triad would pointlessly drive central deterrence risks to the homeland.

Regional nuclear triads not only build the critical deterrent wall, but they are also sufficient to accomplish, at the regional level, the full range of Nixon’s military and political features noted above (deterrence, assurance, counter-coercion, escalatory bargaining, and war winning). Theater nuclear forces of such strength also hedge against the uncertainties involved in adversary nuclear force projection and intentions in the outyears. This reduces regional and homeland risks, and builds the high confidence needed of a strategic sufficiency policy.

Regional nuclear triads would have varying ranges and yields for proportionality and credibility and would afford the same force attributes of survivability, responsiveness, and flexibility provided by the strategic triad. This combination of attributes creates the military, political, and psychological effects that maximize adversary doubts and fears of the consequences of undesired actions. Placing regional nuclear triads in Europe and the Pacific achieves this strong regional deterrent effect unlike any other policy option.

This should be achieved in both theaters. For example, the United States can deploy a combination of ground-based nuclear-armed hypersonic weapons and nuclear-armed F-35 aircraft, nuclear sea-launched cruise missiles (the SLCM-N), and air-launched nuclear-armed hypersonic missiles. Regional nuclear triad means-of-delivery and nuclear weapons must also be of sufficient numerical strength to balance Russian theater nuclear forces in Europe and Chinese/North Korean theater nuclear forces in the Pacific.

As mentioned earlier, American strategic force posture must account for military and political force requirements across the spectrum of conflict. Therefore, in addition to regional nuclear triads, strategic sufficiency 2.0 also requires an American strategic force posture to make three other adjustments to deal with threats.

First, the US must upload its ICBM force with additional nuclear weapons. In keeping with Nixon’s uploading policy, the US should use uploaded missiles to keep pace, weapon for weapon, with Chinese strategic nuclear weapon deployments. This achieves the military and political purposes stated earlier, but also demonstrates political resolve toward arms control at some point.

Second, the posture must safeguard key elements of the homeland from enemy coercion. Missile defenses reassure the American people, but also enable a president to take the risks necessary to effectively escalate and win a conflict where nuclear use is threatened or takes place. A limited defense against coercive attacks against major American population centers and adversary first-strike weapons against American leadership adds that needed reassurance to the deterrence equation.

Third, in partnership with allies, the US must restore regional conventional forces to deter axis aggression. This should include a substantial number of American air-, sea-, and land-based conventional hypersonic missiles capable of defeating, at range, enemy defenses and their anti-access area-denial capabilities. It will also require greater allied burden and risk sharing through increased defense spending, expanding regional combat power and expanding access for American theater nuclear forces.

Challenges to a strategic sufficiency 2.0 policy come in several forms. Detractors may make the following arguments.

First, some may argue that expansion of American nuclear forces will spark an arms race. Unfortunately, an arms race already exists. The United States is not a participant.

Second, some may argue nuclear expansion is unaffordable. Nuclear forces, including ongoing strategic triad modernization, account for 6 percent of the defense budget and less than 1 percent of federal spending. Regional nuclear triads, uploading, conventional hypersonics, and improved missile defenses are minimal in cost. Deterrence is, however, far less expensive than warfighting.

Third, some may suggest a single nuclear weapon system, such as the submarine-launched cruise missile (SLCM-N), is all that is needed for regional deterrence. But this approach leaves out critical military and political features of sufficiency such as attributes, warfighting capabilities, and escalation options that regional nuclear triads offer.

Finally, some could argue that the United States can accomplish its military and political objectives if the nation can strike key targets with the strategic nuclear triad. This force sufficiency assumption is a common trap. Nixon argued that while narrow military planning is necessary in helping to discern strategic sufficiency, he warned against “debatable calculations and assumptions regarding possible scenarios.” Rather, sufficiency dealt more with force capacity in its “broader political sense.” Anything less than full force balance is unacceptable.

The policy of the United States should be to embrace leadership and engagement in the world to resolutely safeguard its national security and that of its allies and partners. To do so, American policy should be to reconstitute strategic force posture, including expanding the strategic nuclear triad through MIRVing ICBMs; establishing theater nuclear triads in Europe and the Pacific; expanding missile defenses; and expanding theater conventional forces.

War prevention is the object of deterrence, a strategy that has worked for over 75 years. Deterrence, strategic stability, and nonproliferation were always the strongest when the US and its allies were strong. Power is the language respected by authoritarians, and the US should not be afraid to wield it. Strategic sufficiency 2.0, with an emphasis on regional nuclear triads, can rebalance the American strategic force posture and create the conditions of strategic stability and deterrence effectiveness against the multipolar axis threat.

Jonathan Trexel, PhD, is a Senior Fellow at the National Institute for Deterrence Studies and on the faculty of Missouri State University. The views presented in this article are those of the author and do not necessarily represent the views of US Strategic Command, the Department of Defense, or the US Government.

Strategic Sufficiency 2.0: Deploying Regional Nuclear Triads was originally published on Global Security Review.

Indeed, as of this writing such probes are already occurring. Sino-Russian aerial probes against Alaska recently occurred in the Arctic. While American officials claim this is the first time this happened, Chinese officials stated that this is the eighth such joint aerial probe. Moreover, the probe took place immediately following Sino-Russian bilateral naval exercises in the South China Sea and around Taiwan.

In a similar fashion, there is evidence that China is providing missile technology to North Korea. This follows the new mutual security pact signed by North Korea and Russia, which came after North Korea made itself a supplier of missiles to Russia in its war against Ukraine. Russian assistance to North Korea’s satellite program is also reportedly taking place.

In the Middle East, China’s negotiation of an agreement on Hamas-Palestinian Authority unity not only conforms to long-standing Russian objectives, but it also facilitates further Sino-Russo-Iranian influence among Palestinians—making a durable Middle East peace even less likely. Pyongyang’s willingness to proliferate nuclear and missile technology to Iran and a de facto Russo-Iranian alliance, only further destabilizes the region and makes a larger scale war more likely.

The same is true in Europe where China emerged as the primary source of Russian revenues, defense technologies, and diplomatic support for its war on Ukraine. Without Chinese support, Russia would be hard-pressed to continue the war. At the same time, numerous accounts show that Russia is engaged in cyber war against Europe, attacking infrastructure and cyber networks. Russia is also planning assassinations of key figures and other mayhem within the countries of the North Atlantic Treaty Organization. Russia is not alone in engaging in these behaviors. While the attacks on France’s national railway system on the eve of the Olympics was very likely a Russian plot, Iran is concurrently threatening Israeli athletes at the Olympic games through cyberattacks.

The number of global attacks and coordination among these four actors, all of whom use nuclear weapons to deter the West from responding to their gray zone attacks, is increasing. Once Iran fields its own nuclear arsenal, which seems increasingly likely, more terror campaigns against Israel, other Middle East states, and international shipping (by Iranian proxies) is likely.  Indeed, the Houthis granted safe passage to Chinese and Russian ships in the Red Sea while Moscow is considering giving them anti-ship missiles. These facts also raise the issue of their use of cyber and hacking devices, if not GPS, to direct and track ships in the Red Sea.

Accordingly, the West faces a multi-domain threat linking all the domains of warfare, including nuclear escalation. These autocracies already incorporated nuclear deterrence, if not escalation, into their strategies against the US and its allies in Asia, Europe, and the Middle East.  North Korea, as well as China and Russia, is building a larger and more diversified arsenal. Soon, North Korea will field a nuclear triad of fighter-bombers, intercontinental ballistic missiles, and submarine-launched cruise missiles.

As a result of their policies, there is virtually no hope of arms control in the near future. China’s recent walkout from nuclear talks exemplifies the utter impossibility of arranging arms control with either Beijing or Moscow. By the same token nonproliferation and the nonproliferation treaty are evidently on their last legs. Beijing’s announcement of its commitment to that treaty’s renewed credibility is thus a grim joke given its ongoing record of support for proliferation. For the next administration, which must deal with facts rather than wish-fulfillment in its defense policy, it is clear that a sustained program of conventional and nuclear modernization, if not an actual increase, is necessary. Moreover, nuclear proliferation appears increasingly likely.

If Iran goes nuclear, the pressure on Saudi Arabia to follow suit increases exponentially. Egypt and Turkey may also follow suit, leading to a Middle East that is equally unstable, but with more nuclear powers.

South Korean public opinion is apparently increasingly supportive of an independent nuclear arsenal, which would lead Japan to follow suit. In short, China, Iran, North Korea, and Russia are all making the world a less safe place as they challenge world order.

While Americans already live in interesting times, the times are likely to become even more interesting as they become more threatening. The United States will face a nuclear-armed autocratic quartet that is focused on supplanting American power. That quartet is also likely to be more dangerous than ever before because the threat, if not the actual use of nuclear weapons, offsets their conventional inferiority and increases their war-making power.

The fevered rhetoric of the current presidential campaign will soon end. The intractable realities will neither end nor give the next administration any respite. They will challenge the nation and force Americans to turn their inward gaze outward.

Steve Blank, PhD, is a Senior Fellow at the National Institute for Deterrence Studies. The views expressed are his own.

The New Nuclear Alliance Against the West was originally published on Global Security Review.