President-elect Donald Trump's support may help House Speaker Mike Johnson put down a conservative rebellion against his leadership.Joe Raedle/Getty ImagesDonald Trump offered his full support for House Speaker Mike Johnson.Johnson is hoping to be reelected as House speaker on Friday.Trump's endorsement may quell a growing frustration about Johnson's leadership.President-elect Donald Trump has set up another quasi-loyalty test for House Republicans before he formally reenters the White House.On Monday, Trump endorsed Speaker Mike Johnson to remain as speaker when the House votes on its next leader on Friday."Speaker Mike Johnson is a good, hard working, religious man," Trump wrote on Truth Social.