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.

The challenge with all such posts is that they never tell the whole story. Yes, Russia and China are refusing to enter arms control negotiations with the United States and Russia is believed to be conducting hydronuclear tests that produce a nuclear yield, but the President’s post does not mean what you may think.

Contrary to the wailing and gnashing of teeth of arms control advocates after Trump’s post, he is not calling for a return to detonating nuclear warheads under the Nevada desert. He is calling for something much different, which is why his post included, “…on an equal basis.” This point is important and was seemingly lost on many.

What many Americans may not know is that the United States last tested a nuclear weapon in 1992 and has, since at least 1996, interpreted the Comprehensive Test Ban Treaty (CTBT) to mean that nuclear testing cannot produce a nuclear yield. Thus, the United States, has voluntarily followed the CTBT and produced “zero yield” in the many tests it has conducted over the past three decades. American scientists were able to verify the continued safety, security, and effectiveness of the nation’s nuclear arsenal without producing an explosive yield.

President Trump is simply enabling American scientists to conduct hydronuclear tests that can provide higher fidelity results as the nation modernizes its existing nuclear warheads and begins building the first new nuclear warhead in more than a generation. This is a very important distinction.

The President, who often speaks in generalities, can be faulted for not offering a level of detail that explained his post more clearly, but articles claiming he does not understand nuclear testing may be less accurate than the President’s critics believe. The relationship between the Department of War and the Department of Energy, when it comes to nuclear weapons, is symbiotic. The Department of Energy designs and builds the weapons at its federally funded and privately operated labs, under the management of the National Nuclear Security Agency, but the Department of War drives the demand for capabilities. Thus, criticizing the President for saying the Department of War will do the testing is a bit of a hollow victory.

With Russia unwilling to extend New START and China’s continuing unwillingness to join multilateral arms control negotiations, President Trump’s statement was an attempt at demonstrating American resolve in the face of America’s declining nuclear position. The reality is that Russia understands its strength is in its nuclear forces, not its conventional capabilities.

If President Trump deserves criticism for anything, it is incorrectly suggesting that the American nuclear arsenal is superior to that of Russia; it is not. Russia’s arsenal is both newer and larger than that of the United States.

Russia may also breakout of New START limits upon the treaty’s expiration, which is a worrying prospect for the United States. Russia’s abrogation the Comprehensive Test Ban Treaty (CTBT) in 2023, in retaliation for Western support of Ukraine, is also concerning. It is, however, unsurprising. Before, Russia at least tried to ensure any violations of the “zero yield” understanding was hidden from the global public. That may cease if the Ukraine war continues. Although, President Trump’s announcement may have contained Russian ambitions.

Russia may have announced “reciprocal measures” if the United States begins testing, but Vladimir Putin knows the US is looking to conduct tests at the same level as Russia’s existing tests. China called on the US to uphold the moratorium on nuclear testing, but China may have also violated the “zero yield” threshold in its effort to build advanced nuclear weapons. Unfortunately, neither the Chinese nor Russian programs is particularly visible to Western monitoring efforts.

The prospects for Russo-American cooperation are low, but this should come as no surprise considering nuclear weapons are Russia’s trump card, no pun intended, when it comes to limiting Western support to Ukraine. Putin cannot afford to lose in Ukraine. His head, quite literally, is on the line.

Chinese nuclear forces are still inferior to American nuclear forces, but not for long. Thus, joining multilateral negotiations are not in China’s core interests as the Chinese Communist Party builds a nuclear arsenal fit for deterring American intervention with Chinese plans to seize Taiwan and perhaps other disputed territories. Of course China responded to President Trump’s post by calling it “unreasonable and unrealistic.” Hypocrisy on nuclear issues will not, however, stop Chinese communists from expanding their arsenal.

President Trump’s post is understandable given the world in which he finds himself. The President must try to deter continued Chinese and Russian aggression. If resuming nuclear testing helps, it is well worth the effort. What the President’s words will not do is start an arms race. That would require the United States to be a participant, and the Chinese and Russians left the starting blocks long ago.

Adam Lowther is the Co-founder and VP for Research at the National Institute for Deterrence Studies.  Views expressed in this article are the author’s own.

Understanding President Trump’s Truth Social Post on Nuclear Testing? was originally published on Global Security Review.

Professional diplomats in the United States and its North Atlantic Treaty Organization (NATO) allies might have wondered if this was an unrehearsed skit from Saturday Night Live.  Only Alec Baldwin playing the role of Trump was missing. Allies do not talk to each other like in front of the media.

It was clear that Trump and Vice President JD Vance expected to have a pleasant conversation in front of the cameras, have a nice private lunch, and then publicly sign a mineral deal with President Zelensky. They did not expect the pushback and demands that came near the end of the conversation. As a famous French diplomat once said, with respect to another diplomatic blunder, it was “worse than a crime. It was a mistake.”

Zelensky ended up being unceremoniously escorted out of the White House without lunch or a deal. The agreement that would allow the United States to mine rare Earth minerals in Ukraine was that it would repay the United States for the more than $160 billion that American taxpayers have invested in Ukraine’s defense. Profits from American mining operations would also help rebuild Ukraine. American businesses operating in Ukraine would also offer de facto security guarantees to Ukraine. Absent such an agreement, it was feared that China may partner with Ukraine to mine these critical minerals.

While President Trump is likely genuine in his desire to see the killing end and Ukraine rebuilt, Ukraine is only a small part of a larger strategic game the United States is playing. The Trump administration believes that Europe is no longer the strategic pivot of international relations. Instead, the focal point of American diplomacy and military preparedness is the Far East, with a rising China as the main adversary standing in the way of American global leadership and international influence. Europe is a secondary theater of operations, and it is time Europeans bare the burden of their own defense.

This view is a tectonic shift in American focus, but understandable. China has ambitions that go well beyond military and political competition with the United States in China’s backyard.

China’s global strategy of multi-domain competition with the US includes all spheres of power and influence. Its tool kit includes explicit challenges to the United States in the development and deployment of nuclear weapons, the military use of space, artificial intelligence development, cyberwar, and economic influence.

China’s ambitious naval expansion may fall short of driving the US Navy from the high seas, but its combined arms approach to anti-access and area denial (A2AD) in East Asia is intended to deter and, if necessary, defeat any power that would oppose China’s mastery of its immediate sphere of influence, including Taiwan.

Nevertheless, recognition of the threat posed by a rising China does not invalidate the strategic significance of events in Europe. America’s commitment to the defense and security of a free Europe is not transactional, it is existential. This is embodied in the NATO alliance.

NATO is the result of symbiotic relationships among democratic states that provide collective security within a context of political freedom. Ironically, this is why JD Vance’s challenge to European allies at the Munich Security Conference was so interesting. Vance noted that the United States and Europe are linked, not only by procedures and financial commitments, but also by shared values, including free speech. He rightly urged the European members of NATO and the European Union to enhance their commitments to free speech that, in his view, are in decline across Europe.

Russia’s aggressive war against Ukraine, with its objective of destroying Ukraine’s armed forces, economy, infrastructure and its viability as a state is clearly grossly immoral. But evil in the world is nothing new, nor is it incumbent on the American taxpayer to fund every effort to eradicate all evil in the world. American efforts to impose liberal democracies where they do not exist has a poor track record of success.

Europe was the cradle of American civilization, but Americans fled Europe because of religious persecution, a lack of economic opportunity, and other reasons that are inconsistent with freedom. Doubtless, Zelensky and other European politicians drive their American partners crazy at times. During the Second World War, Charles de Gaulle drove British Prime Minister Winston Churchill and Supreme Allied Commander General Dwight Eisenhower to distraction.  But the imperious de Gaulle was the symbol of French nationalism for those who opposed Germany and the Vichy regime.

An American abandonment of a free Europe would leave Europe to repeat its past mistakes, which the continent has repeated over and over and over again. Zelensky is far from an ideal partner. However, a Ukraine swallowed by Russia will result in a less stable Europe.

Vladimir Putin clearly sees a free Ukraine as a political and economic threat to Russia.  He denies that Ukraine is a distinct civilization or country. He constantly refers to Ukrainians as neo-Nazis. A negotiated settlement will not change this perspective. Any agreement with Putin must follow President Ronald Reagan’s dictum, trust but verify.

Ironically, one outcome of the war between Russia and Ukraine is the enlargement of NATO with the addition of Finland and Sweden. Thus, NATO added considerable strategic depth and an ability to prevent Russian ships from leaving port in the Baltic Sea. Without the United States, European NATO may waiver. In the end, President Trump’s efforts to push European states to play a larger role in their own security are important, but they should never lead to an American departure from the Alliance.

Stephen Cimbala, PhD, is a Professor at Penn State University at Brandywine and a Senior Fellow at the National Institute for Deterrence Studies.

Trump and Zelensky: Bad Manners or Strategic Disaster? was originally published on Global Security Review.