“Let’s do a pledge. Who likes me in this room?” the Republican presidential candidate asked a large crowd Saturday in Orlando, Florida. “Raise your right hand: ‘I do solemnly swear that I — no matter how I feel, no matter what the conditions, if there’s hurricanes or whatever — will vote, on or before the 12th for Donald J. Trump for president.’” (Trump misstated the date of the Florida primary, which will be held on March 15.)As the audience enthusiastically complied with his request, the candidate told them: “Don’t forget you all raised your hands. You swore. Bad things happen if you don’t live up to what you just did.