The Senate voted 50-47 to advance a resolution limiting President Trump's Iran war powers, with four Republicans breaking ranks to join Democrats in a significant bipartisan move.

The war with Iran has now blown past the 60-day requirement under the War Powers Act for the president to seek the authorization of Congress.

On the heels of losing his primary election, Republican Sen. Bill Cassidy immediately bucked the leader of his party.

Measure marks a rare rebuke of President Trump