One of the few things Jeb Bush is right about is his obvious belief that Donald Trump is a menace. Fine. If Bush really believes that, and if he really wants to do a great service to our country, then the former Florida governor should take one bold step to suck the (hot) air from Trump’s balloon: Withdraw from the presidential race. If Jeb Bush withdraws, a hy-u-uuge portion of the rationale for Trump’s candidacy will be withdrawn as well. Trump is soaring in polls for four main reasons. First, because he talks tough, in plain language. Second, because he...