File - Former President Donald Trump listens as Speaker of the House Mike Johnson (R-LA) speaks during a press conference at Mr. Trump’s Mar-a-Lago estate on April 12, 2024, in Palm Beach, Florida.Joe Raedle/Getty Images
Speaker Mike Johnson criticizes Obamacare and promises ‘massive reform' if Trump wins
Any major rollback of ACA would require Republicans to win the presidency and control of both chambers of Congress, as Democrats would be all but certain to block such an effort