Four Republicans voted against US President Donald Trump on Tuesday as the Senate advanced a war powers resolution aimed at forcing him to end the war in Iran.

The measure marks a symbolic win for Democrats and a growing number of Republicans who have questioned the Trump administration's war with Iran.

Chamber advances bill for first time as four Republicans join all but one of Senate’s Democrats in favor

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.

Since President Trump ordered an attack on Iran at the end of February, Democrats have repeatedly forced votes on war powers resolutions

Measure marks a rare rebuke of President Trump

Four Republicans voted against US President Donald Trump on Tuesday as the Senate advanced a war powers resolution aimed at forcing him to end the war in Iran.

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.

Four Republicans join Democrats in procedural vote against president’s stance on Iran; Lawmakers cite Constitution giving Congress authority to declare war.