Headed for history books a week from Tuesday, the duel between Hillary Clinton and Donald Trump became a battle of "nasty women" and "bad hombres" vs. "deplorables" and voters who are "irredeemable." A beauty queen, a Gold Star family, an ex-president and his baggage, the FBI director, even the pope were drawn into the fray. At times, the campaign rhetoric has been so raunchy it's forced middle-school civics teachers to censor their lesson plans. Thank Trump for that. But Americans can't say they weren't warned. On June 16, 2015, minutes into a rambling campaign announcement speech, Trump was labeling Mexican immigrants as rapists and criminals. He's been horrifying or delighting people with provocations ever since. Eleven Republicans were already in the race when Trump joined the field, with five still to come. It was reasonable to view the impolitic Trump as an improbable choice for the Grand Old Party.