WASHINGTON—The leader of Senate Democrats moved to take the threat of a government shutdown off the table, following a grueling intraparty fight in which lawmakers struggled with how best to resist President Trump’s fast-paced efforts to slim down federal agencies.

Chuck Schumer, the top Democrat in the Senate, said he would vote to end the filibuster, indicating sufficient support among other party members to allow vote on Republican bill.

Schumer’s comments are a change in tune from Wednesday when he said that Democrats would not provide the votes needed to approve the House-passed stopgap funding measure. He argued that the Senate should instead vote on a “clean” bill that would maintain spending levels for 30 days to enable bipartisan negotiations.