The Senate reversed course on Iran war powers, blocking a measure that would restrict presidential military authority after President Trump criticized an earlier vote; the 50-47-1 result reflected shifts by several Republicans amid ongoing negotiations with Tehran. The reversal followed a White House briefing that addressed lawmakersā concerns and underscored the administrationās leverage in diplomacy. The House had previously passed a similar measure under the War Powers Act framework, intensifying the political clash. The episode highlights tensions between congressional oversight and executive negotiations as talks with Iran continue. The situation remains dynamic as negotiations move forward with Tehran.
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Tuesday saw a House-passed Iran war powers measure cleared the Senate 50-48, with four Republicans joining most Democrats, but the measure was later blocked in a separate vote the next day, failing 50-47-1.
Sen. Bill Cassidy had supported the earlier measure but voted against advancing the latest resolution after a White House briefing, following a lunch with Trump and a briefing from Vice President JD Vance and Special Envoy Steve Witkoff.
Sen. Rand Paul voted present on the latest measure, explaining his stance as maintaining leverage for the presidentās negotiating position, while Sen. Susan Collins and Sen. Lisa Murkowski supported moving the measure forward with Democrats.
Trump publicly criticized the Tuesday vote, arguing it undercut his negotiating leverage and claimed Tehran was on the ropes, and later celebrated the Senateās shift as Iran being put on notice.
A White House briefing addressed lawmakersā concerns, with Cassidy thanking Vance and Witkoff for clarifications on the Iran operationās objectives and timeline.
The vote is part of the 11th iteration of Iran war powers considerations in the Senate since January, reflecting ongoing tensions between congressional oversight and executive diplomacy as talks with Tehran proceed.