Opponents of the war in Yemen have picked up momentum heading into a critical Senate vote on Wednesday on whether to end U.S. support for the Saudi-led coalition. Sen. Bob Menendez of New Jersey, the highest-ranking Democrat on the Foreign Relations Committee has said that he would support the measure. Sen. Chris Coons of Delaware, also on the Foreign Relations Committee, has told colleagues that he supports the effort as well, Democratic aides told The Intercept. Both senators voted to table the effort — which was introduced by Sens. Bernie Sanders, Mike Lee, and Chris Murphy — the last time it arrived on the Senate floor in March. Menendez is one of the more hawkish Democrats in the chamber, and his support for the resolution is a sign that the party is coalescing around opposition to the war. Saudi Arabia and the United Arab Emirates began their intervention in Yemen in March 2015, launching a bombing campaign aimed at restoring Yemen’s former president, Abdu Rabbu Mansour Hadi, to power. For more than three years, the campaign has contributed to an exploding humanitarian crisis that has left millions at risk of famine.

In a procedural vote, the Senate voted 55-44 against a similar measure in March, with 10 Democrats voting against it. But five Republicans voted in favor at the time. If those GOP senators vote the same way on Wednesday, just four of the remaining eight Democratic holdouts would have to vote in favor for the measure to pass. The renewed push to end the war comes after Saudi agents murdered Washington Post contributor Jamal Khashoggi in October, triggering global outrage and making support for Saudi Arabia toxic on Capitol Hill. Four Democratic aides told The Intercept that in the wake of Khashoggi’s killing, many of the Democrats who voted against the measure in March are likely to flip. In addition to Menendez and Coons, North Dakota Sen. Heidi Heitkamp, Nevada Sen. Catherine Cortez Masto, and others are considering a vote in support of the measure. West Virginia Democrat Joe Manchin told reporters in the Capitol on Tuesday that he was undecided and would wait until after a Trump administration briefing Wednesday morning to decide how he would vote. It is unclear how Rhode Island Democrats Sen. Jack Reed and Sen. Sheldon Whitehouse will vote. Both voted against it in the spring but have faced continued pressure from activists in their home state to support the measure. Their offices did not return requests for comment. Senate Minority Leader Chuck Schumer, who voted in favor of the resolution in March, signaled his support for the measure on Twitter last week.