Conservatives on the House Budget Committee on Friday blocked their party’s megabill from reaching the floor, citing concerns that the legislation to fulfill President Trump’s domestic agenda would add too much to the deficit.

It was a remarkable revolt that threatened to upend the party’s drive to push the legislation through the House before a Memorial Day recess, and sent Republican leaders scrambling to try to put down the uprising.

Five Republicans — Representatives Chip Roy of Texas, Ralph Norman of South Carolina, Josh Brecheen of Oklahoma, Andrew Clyde of Georgia, and Lloyd Smucker of Pennsylvania — joined Democrats in voting against the legislation. The vote was 16 to 21.