Trump’s NATO Leverage Is Starting to Look Like Deterrence Roulette

The most dangerous sentence in alliance politics is not “we are leaving.” It is “figure it out.”

That is the problem with President Donald Trump’s latest signals on U.S. troops in Poland and Europe. On May 21, 2026, Trump said the United States would send an additional 5,000 troops to Poland, only after his administration had said it was cutting U.S. force levels in Europe by about 5,000 and U.S. officials had confirmed that about 4,000 service members were no longer deploying to Poland, according to Associated Press reporting¹. The following day, the AP reported that NATO allies and U.S. defense officials were bewildered by the apparent reversal, while commanders had already begun reacting to the earlier drawdown signal and allies had started wondering what they might need to backfill on the eastern flank near Russia and Ukraine according to the AP².

I understand the theory behind Trump’s pressure. NATO, the North Atlantic Treaty Organization, is a military alliance built around collective defense. Its central promise is Article 5, which says an armed attack on one member is considered an attack on all, though each ally decides what action it deems necessary to help under NATO’s own explanation³. Burden-sharing, in plain English, means the Europeans are supposed to bring enough money, troops, bases, ammunition, transport, cyber defenses and air defenses to make that promise real. Trump has spent years arguing that the United States carries too much of that load. He is not wrong about the imbalance.

But my read is that the current ambiguity is weakening deterrence more than it is strengthening leverage. Deterrence is not a mood. It is a machine. It works when Moscow can see that the alliance has (1) the political will to respond, (2) the forces in place or ready to move, and (3) the command, logistics and air-defense systems needed to act fast. “Force posture” is the military term for that whole arrangement: where forces sit, how ready they are, what they can do, and how they plug into allied plans. If Washington makes the marginal U.S. troop presence in Poland look like an improvisation, allies cannot plan confidently and Russia gets more room to probe.

The strongest defense of Trump’s method is that ambiguity can produce results. At the 2025 Hague summit, NATO leaders reaffirmed their “ironclad” commitment to Article 5 and adopted a new goal to invest 5% of GDP annually in defense and defense-related security by 2035, including at least 3.5% for core defense requirements and annual national plans to reach that target in the Hague Summit Declaration⁴. Spain is the obvious target for U.S. pressure: NATO’s 2025 defense-expenditure tables estimate Spain at 1.43% of GDP in 2024 and 2.00% in 2025, while Poland is estimated at 4.48% in 2025 in NATO’s defense-spending data⁵. Madrid also publicly argued that it could meet alliance capability requirements with 2.1% of GDP, not 5%, according to the Spanish government⁶.

That is a real dispute, not a Trumpian fantasy. Europe needs more combat power. It needs more ammunition production. It needs more integrated air and missile defense, meaning networks of sensors, command systems and weapons that can detect and defeat aircraft, drones, cruise missiles and ballistic missiles. NATO says its integrated air and missile defense mission protects alliance territory, populations and forces against air and missile threats, and that it depends on linked national and NATO systems of sensors, command-and-control assets and weapons according to NATO⁷. If Trump’s pressure forces under-spending allies to build those capabilities faster, good.

But the leap from “burden-sharing pressure is justified” to “public confusion over U.S. deployments is useful” is where the argument breaks. Poland is not just another ledger entry in a NATO spending table. It is the alliance’s most important eastern-flank test case, bordering Belarus and sitting near the war in Ukraine. U.S. Army Garrison Poland, established in 2023, supports 7,500 American soldiers across 12 sites and enables V Corps readiness according to U.S. Army V Corps⁸. Earlier U.S. Defense Department posture plans put permanent V Corps forward command-post elements, an Army garrison headquarters and a field-support battalion in Poland, while also maintaining rotational forces including an armored brigade combat team, a combat aviation brigade element and a division headquarters element according to the Pentagon’s 2022 Europe posture fact sheet⁹.

That kind of posture is not interchangeable with a headline number. An armored brigade rotation canceled in May and a presidential announcement of 5,000 troops two weeks later may net out to a politically pleasing total. It does not automatically net out to the same war plan. Reception facilities, rail routes, fuel, ammunition stocks, exercises, air-defense coverage, intelligence-sharing and command authorities are planned around specific units and timelines. When those timelines blur, the alliance loses something that does not show up in a troop-count chyron: confidence in execution.

Russia is already testing seams. NATO says that in September 2025 an unprecedented number of Russian drones and planes violated allied airspace, including Russian drones entering Polish airspace and fighter jets entering Estonian airspace, leading to Article 4 consultations, which are emergency consultations when an ally feels its security is threatened according to NATO¹⁰. NATO then launched Eastern Sentry, a multi-domain activity that added fighter jets, helicopters, transport aircraft, air-defense systems, surveillance aircraft and frigates along the eastern flank according to NATO¹⁰. On May 13, 2026, leaders of 14 eastern-flank allies said repeated Russian airspace violations underscored the urgent need to strengthen NATO air and missile defense against missiles and drones according to Reuters¹¹.

There is also nuclear signaling, which means public or operational messaging about nuclear forces meant to intimidate, warn or shape an opponent’s choices. On May 21, 2026, Russia and Belarus held the final stage of joint nuclear drills involving intercontinental ballistic missiles, submarines and warplanes, while Belarusian leader Alexander Lukashenko inspected Russian nuclear-capable Iskander missiles according to AP¹². That does not prove Moscow is about to attack NATO. It does show that the eastern flank is a live theater of military pressure, drone incursions, hybrid activity and nuclear messaging, not a seminar room for alliance-management experiments.

The counterargument I take seriously is that NATO did not collapse under this pressure. It reinforced. Eastern Sentry is evidence of institutional resilience, and The Hague spending deal is evidence that Trump’s pressure can move European politics. I think that misses the timing problem. A 2035 spending goal may eventually strengthen deterrence, but Russian drones, sabotage and nuclear drills are happening now. CSIS analyst Seth Jones wrote in 2025 that Russian sabotage and subversion in Europe had tripled between 2023 and 2024 after quadrupling between 2022 and 2023, and that European militaries still lack key capabilities such as short-range air defense, long-range fires, heavy maneuver forces and precision munitions in CSIS testimony on NATO’s eastern flank¹³. The future European army cannot defend today’s Polish airspace.

So yes, Trump should keep squeezing allies that under-spend. He should make Spain, Belgium, Italy, Canada and others explain how their budgets match NATO’s actual defense plans. He should reward Poland’s seriousness. He should push Europe to buy air defenses, drones, ammunition and logistics capacity instead of treating U.S. reinforcement as a public good with no invoice.

But serious burden-sharing pressure needs private operational clarity. The White House can be blunt in public and precise in classified channels. It can say, “Europe must carry more,” while giving NATO planners firm deployment schedules, unit identities and replacement plans. What it should not do is make allies infer force posture from social media posts and sudden reversals. The Kremlin does not need Washington to formally abandon Article 5 to gain an advantage. It only needs enough uncertainty to make the next drone incursion, sabotage attempt or nuclear threat look worth trying.

My benchmark is simple: if, by the end of 2026, the United States has issued a clear Europe force-posture plan, Poland’s rotational brigade presence is restored or explicitly replaced by named allied capabilities, and eastern-flank air-defense deployments increase, then Trump’s chaos may harden into leverage. If not, the alliance will have traded one problem, European free-riding, for another: deterrence by guesswork. That is not strategy. It is roulette with a Russian audience.