But the outcome remained far from certain. Jordan was within striking distance of the 217 votes he would need to be elected in a planned vote around noon on Tuesday. Jordan, the hard-line co-founder of the ultraconservative House Freedom Caucus, fell into line after a pressure campaign by his right-wing allies and a series of one-on-one calls with him. Several mainstream Republicans who had said they could not countenance a vote for Mr. ranks even as deep reservations remained about elevating him to the top post in the House. Representative Jim Jordan of Ohio picked up steam on Monday in his bid to become speaker, winning over several of his biggest opponents in the fractured G.O.P. Follow our live updates for the House speaker vote.