Sen. Bill Cassidy (R-La.), who lost his bid for a third term in Saturday’s Louisiana Senate Republican primary, on Tuesday became the fourth Republican senator to vote to advance a war powers resolution directing President Trump to withdraw U.S. armed forces deployed against Iran.

Cassidy joined Republican Sens. Rand Paul (R-Ky.), Susan Collins (R-Maine) and Lisa Murkowski (R-Alaska) in voting Tuesday for a motion to discharge the war powers resolution sponsored by Democratic Sen. Tim Kaine (D-Va.) out of the Senate Foreign Relations Committee.

The motion passed by a vote of 50 to 47, setting up a future vote to proceed to the motion on the Senate floor.