The House on Thursday narrowly passed a resolution to halt U.S. military action in Iran, sending a warning to US President Donald Trump for the second time as the war has escalated and the future of the conflict is increasingly uncertain.

Axar.az reports, citing The Associated Press, that the 214-208 vote requiring congressional approval for the war came just before the Senate narrowly rejected a similar resolution, 47-49. Though the votes forced by Democrats are largely symbolic, they are meant as a signal to the Republican president that his support on Capitol Hill is chipping away as the war drags on and lawmakers in both parties have questioned his administration’s endgame.

The war has had “no clear mission, no strategy, no end goal,” said Washington Rep. Pramila Jayapal, a Democrat who led the resolution on the House floor.

The House resolution passed after a handful of Republicans voted with Democrats to end the war. But the vast majority of Republicans in both chambers voted to back the war and cede congressional war powers to Trump.

It should be noted that the resolution is nonbinding and carries recommendatory status. Such measures are used by lawmakers to express their position, and the U.S. administration has the authority to disregard them.