The Senate advanced an Iran war powers bill, aiming to force an end to the war with Iran, after Sen. Bill Cassidy (R-LA) flipped his vote fresh off a resounding primary loss.

The bill had previously been shot down because of a lack of Republican support. Cassidy is the key defection, as he previously withheld voting in favor of a measure that is sure to anger Trump. With nothing to lose, he signaled he was now in favor.