“I just cringed,” said one member of Jeb Bush’s extended circle of advisers when asked his reaction to Bush’s recent mini-tantrum on the state of the Republican presidential race. “Every politician, at some point, and sometimes justifiably, is pissed off at the voters. But you can’t display your frustration with the public.”

That’s what Bush did, thrusting into public view the deep frustration that has been building as his once-mighty campaign slipped behind not only Donald Trump but other GOP rivals as well.