On July 14, 2026, Senate Democrats voted against the National Defense Authorization Act (NDAA) in a 50-46 vote, opposing the bill as a response to the ongoing conflict in Iran. All Democrats in the chamber opposed the legislation, which typically garners bipartisan support and sets annual policy priorities for the Pentagon. Republicans required a few additional votes to overcome the Senate's 60-vote filibuster threshold.
The vote followed the breakdown of a ceasefire with Iran, which has resumed its blockade of the Strait of Hormuz, a critical energy supply route. In a letter to Congress, President Donald Trump indicated the renewal of conflict, invoking the War Powers Act to extend military engagement for an additional 60 days. The U.S. and Israel initiated the conflict in February, aiming to compel Iran to dismantle its nuclear program.
Democrats had previously indicated their intention to oppose the NDAA, with nine out of thirteen members of the Armed Services Committee voting against it during its markup in June. Senate Minority Leader Chuck Schumer (D-NY) expressed strong opposition to the bill, criticizing the administration's use of the War Powers Act and emphasizing the need for Congress to address pressing national security issues. Senate Majority Leader John Thune (R-SD) urged Democrats to avoid obstruction, highlighting the bill's provisions for troop pay raises and national security threats. Last year's NDAA passed with significant bipartisan support, receiving a 77-20 vote.