He has fulfilled the moniker bestowed on him by Donald Trump by shrinking in stature as suddenly as Alice does in Wonderland. He could hardly have done worse in Tuesday’s contests, finishing either dead last or third and capturing no delegates. (Even John Kasich won 17.) He goes into his home state of Florida—where he intends to make a last stand on March 15—with something like negative momentum. His attempts to out-insult Trump appear to have backfired spectacularly, a failing Trump diagnosed with typical acuity in his victory press conference. “Hostility works for some people,” he said, “it doesn’t work for him.” With Trump continuing to lead Rubio in Florida, Little Marco is in danger of disappearing completely.