At a recent law-and-order rally with NYPD officers, 80-year-old Donald Trump strayed far from the public safety focus. He first repeated the false claim that D.C. was "one of the most dangerous cities" before his actions—though violent crime there had hit a 30-year low. Then he launched into a creepy rant about "young, beautiful girls" approaching him in the White House, gushing over his federal law enforcement takeover in D.C. Have you ever seen a public figure derail a serious event with such an odd tangent? How would you react if you were there?