Speaker Mike Johnson on Wednesday easily batted down an attempt by Representative Marjorie Taylor Greene of Georgia to oust him from his post, after Democrats linked arms with most Republicans to fend off a second attempt by G.O.P. hard-liners to strip the gavel from their party leader. The vote to kill the effort was an overwhelming 359 to 43, with seven Democrats voting “present.” Unlike the ouster that toppled Kevin McCarthy last fall, Democrats flocked to Mr. Johnson’s rescue, with...