The unexpected move on Thursday came as the Senate advanced a similar resolution

Four Republicans voted with nearly all Democrats to advance the Iran war powers measure, with GOP Sen. Bill Cassidy joining the Republican defectors for the first time.

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.

House Republicans pulled a vote, through a procedural loophole, that could have reined in President Donald Trump's war powers in Iran.