WASHINGTON A majority of the Senate supports limiting further hostilities against Iran despite opposition from Republican leadership and President Donald Trump , Senate Minority Leader Chuck Schumer (D-N.Y.) announced Tuesday.

The House last week approved a war powers resolution forbidding the president from attacking Iran unless theres an imminent threat or Congress declares war.

Democrats are pushing to pass a similar measure in the Senate, saying the Trump administration failed to sufficiently justify the killing of Iranian military leader Qassem Soleimani without first seeking congressional approval. Democrats and a few Republicans have also questioned the administrations initial rationale for the attack, which included a stated imminent attack on U.S. troops in the region.

On Tuesday, Sen. Tim Kaine (D-Va.) announced that four Republican senators Rand Paul of Kentucky, Mike Lee of Utah, Susan Collins of Maine and Todd Young of Indiana had committed to vote with all 45 Democrats and two independents in support of his resolution limiting military action in Iran. The measure needs just 51 votes for passage.

We now have a majority of colleagues who will stand strong for the principle that we shouldnt be at war without a vote in Congress. And Im going to keep working to get more, beyond the 51, the Virginia Democrat said at a press conference.