Representative Brian Fitzpatrick of Pennsylvania cast the only Republican vote against the procedural rule needed to advance President Donald Trump’s “One Big Beautiful Bill,” temporarily stalling the high-profile package in the narrowly divided House. Moments after voting “no,” the congressman left the chamber, prompting party leaders to scramble to locate him and salvage the measure. Fitzpatrick tied his opposition to the administration’s suspension of U.S. weapons shipments to Ukraine. In a 2 July letter sent to Trump and senior defense officials, he demanded an emergency congressional briefing on “the decision to withhold urgent, lifesaving military assistance to Ukraine,” warning that the pause comes as Russia steps up its summer offensive. The Pentagon has confirmed a temporary halt in deliveries of certain air-defence missiles and precision munitions amid concerns about U.S. stockpiles, while Kyiv says it has received no formal notice of a change in schedules. Fitzpatrick argued that Washington can bolster its own defense industrial base while still arming Ukraine, writing, “There can be no half-measures in the defence of liberty.” With the House GOP holding only a slim majority, leadership cannot move the bill forward without Fitzpatrick’s support. His stand highlights persistent Republican divisions over foreign aid and leaves the fate of Trump’s signature domestic legislation uncertain until an agreement on Ukraine funding is reached.