The vote, while symbolic, underscores Republican concern about the U.S. military campaign.

House lawmakers delivered a stunning bipartisan condemnation of the Iran war on Wednesday, dealing President Donald Trump his most significant political setback since the conflict began.

Four Republicans joined Democrats in a vote to effectively halt military operations in the Middle East unless Congress authorizes it, the clearest sign yet of frustration within the GOP as the war stretches on and gas prices skyrocket — and the latest in a series of recent losses for the president.

The 215-208 bipartisan vote is largely symbolic, as Trump would almost certainly veto any legislation that restricts his authority. But the politically damaging vote underscores dissent within his own party on key aspects of the president’s agenda, and could be a catalyst as the Senate considers similar legislation that advanced in a surprise initial vote last month.