”Because he's always out there? Isn't there a tradition in the British royal family that they fly a flag at the residence when the monarch is there? Trump probably has some such affectation (or the guy just looked at his campaign schedule and figured out where he'd be)?”

Good points, SRS, but I don’t believe would-be-assassins rely on coincidence or happenstance - the guy on the roof at the tRump rally knew precisely where Agent Orange would be and when, Routh was just guessing.

I wouldn’t put anything past tRump and his bunch - he’s already learned the value of an ‘assassination attempt’ in boosting his popularity.