The US Senate voted 50-47 Tuesday May 19 to advance Sen. Tim Kaine's War Powers Resolution directing the President to remove US Armed Forces from hostilities against Iran absent a declaration of war or a specific AUMF. Four Republicans crossed - Bill Cassidy (his first "yes" after a Trump-endorsed-opponent primary loss), Rand Paul, Lisa Murkowski, Susan Collins - in a rebuke to Trump. It is a procedural advance, not law: a final Senate vote, House passage, and an all-but-certain Trump veto stand between it and effect.