The United States Senate voted on Tuesday to demand that President Donald Trump end military hostilities with Iran, making history in the process. It is the first time since the War Powers Resolution was enacted in 1973 that both the Senate and the House of Representatives have passed a concurrent resolution ordering a president to halt a military operation. Four Republican senators — Rand Paul, Lisa Murkowski, Susan Collins, and Bill Cassidy — crossed party lines to vote with Democrats, while Democrat John Fetterman was the lone member of his party to vote against it. A White House official noted that the measure only passed because two Republican senators, Mitch McConnell and Dave McCormick, were absent.

Trump responded within hours on his Truth Social platform, describing the vote as "poorly timed and meaningless" and insisting he had Iran "on the ropes." He warned that the senators had made his job harder, but vowed to get it done regardless. The White House also argued that the resolution was moot, since a ceasefire had already been agreed on 7 April, leaving no active hostilities from which to withdraw American forces. The legal weight of the measure is limited.

Middle East analyst Laura Blumenfeld told the BBC it was "more of a slap on the wrist than a handcuff," because a concurrent resolution carries no binding legal force and does not go to the president for signature or veto. In 2019, Trump vetoed a stronger joint resolution that had sought to remove US forces from Yemen.