Allies Are Quietly Weighing Their Own Nukes as Trump Downgrades the U.S. Umbrella

For 80 years, the deal was simple. Allies didn't need their own nukes because America's did the job. That deal is looking shakier by the month.

President Trump's 2026 National Defense Strategy dropped any explicit mention of extended deterrence, according to CNBC. Trump has also been leaning hard on allies to fund their own defense instead of counting on Washington. Ankit Panda, senior fellow in the Nuclear Policy Program at the Carnegie Endowment for International Peace, told CNBC that allies increasingly see Washington as "disengaged and unreliable," and that's pushing them toward "various flavors of strategic autonomy."

Some of these countries are eyeing their own bombs.

The immediate triggers

Trump ordered a reduction in joint military exercises with South Korea, saying the drills sent a signal "totally inappropriate and hostile" to North Korea, per CNBC. Around the same time, the U.S. opened talks on peaceful South Korean enrichment and reprocessing, and signed a civil-nuclear pact with Saudi Arabia that reportedly could open a path to domestic enrichment there too.

Enrichment and reprocessing are the technical steps that sit right next to weapons capability. Nobody's saying Seoul or Riyadh is racing for a bomb. But the infrastructure conversation has moved from taboo to table-stakes.

In Asia, the fallout runs deeper than one exercise. An editorial in The Standard (Hong Kong) argued that U.S. carrier groups, air-defense systems, and precision munitions have been stretched thin across the Middle East and Eastern Europe, exposing "the hard limits of Washington's global commitments." That piece notes South Korean domestic politics has shifted toward openly discussing sovereign deterrence, and that Japan already sits on roughly 45 tons of separated plutonium with a complete civilian fuel cycle. Tokyo could pursue a weapon fast if it chose to. Japan's ruling Liberal Democratic Party is reportedly debating NATO-style nuclear sharing.

Iranian outlet Mehr News, citing a New York Times analysis, tied the anxiety directly to the 40-day war between Iran and the U.S. earlier this year. American forces reportedly took missile and drone hits, evacuated some bases, and drew down air-defense missile stockpiles during that conflict. Mehr's framing is that the war exposed real limits on U.S. capacity to fight in multiple theaters at once. The Philippines diversifying its security partnerships is one visible reaction. Militaries do have finite stockpiles, and a two-front strain is a real operational constraint.

Europe is moving too, but differently

France is going the opposite direction from nuclear anxiety, toward nuclear expansion and sharing. Macron announced France's first warhead increase since 1992 back in March, unveiling a "forward deterrence" doctrine in front of a Le Triomphant-class submarine. Nine countries, including Germany and Greece, have signed onto the initiative, according to CNBC.

The Daily Signal reported that on July 17, France and Germany announced Berlin will join a French nuclear exercise called Poker later this year, a rehearsal of France's airborne nuclear capability, at a Franco-German summit at Germany's Nörvenich Air Base. The Daily Signal's take, explicitly framed as opinion, is that this is a good thing: it keeps nuclear decision-making sovereign and in Paris while giving Germany a credible deterrent option as Russia gets more aggressive. Macron did not fold France's arsenal into NATO command. Control stays entirely with the French president.

Lithuania and Finland, both bordering Russia, have moved closer to scrapping their own bans on hosting nuclear weapons domestically, CNBC reported.

Washington's own doctrine is shifting too

It's not just about what allies do. NBC News reported, and Fox News relayed, that the Pentagon is drafting a classified nuclear strategy under Under Secretary of War for Policy Elbridge Colby that would give Trump more options to use shorter-range, tactical nuclear weapons in a regional fight with China or Russia, rather than defaulting to long-range strategic forces. A senior War Department official told NBC the goal is to "expand the President's option space" and strengthen deterrence, arguing that having flexible, credible mid-tier options makes escalation to full strategic war less likely, not more.

That's a genuinely defensible argument on its own terms: a president with only an all-or-nothing button might hesitate to respond at all, undermining deterrence. The counterargument, made implicitly by analysts across these sources, is that any expansion of nuclear options—American or allied—resets the baseline for adversaries too.

The proliferation math

Shounak Set, a research fellow at Singapore's S. Rajaratnam School of International Studies, told CNBC that no single move here amounts to a decision to build a bomb. But he warned that one country's security move can make an adversary feel less secure, "potentially encouraging them to strike first." Andrew Facini of the Council on Strategic Risks put it more bluntly: building or deploying a deterrent immediately raises tensions and forces adversaries to react, possibly accelerating the very risks a country was trying to avoid.

The Stockholm International Peace Research Institute's June report, cited by ua.news, put the U.S. and Russia at roughly 83% of the world's operational warheads, with more than 12,000 total warheads held globally and up to 2,200 kept on high alert. Talks at UN headquarters in May failed to reach consensus, and UN Secretary-General António Guterres warned the N