President Trump went after four of his Democratic opponents at a Florida campaign rally Wednesday night, smacking South Bend Mayor Pete Buttigieg especially hard for the first time. “We have that young man, Buttigieg, boot-edge-edge, they say boot-edge-edge,” Trump said, repeating the pronunciation chant that supporters of the 37-year-old mayor use at rallies. “He’s got a great chance, doesn’t he? He’ll be great representing us against President Xi of China.” “I want to be in that room, I want to watch that one,” the president said at the event in Panama City Beach. Prior to bringing up Buttigieg — who...