It was here that in delivery, after the crowd booed at the first mention of the GOP nominee, that Obama ad-libbed one the best lines of the convention: "Don't boo, vote!"

Given the jeers from "Bernie or Bust" delegates over the first few days of the convention, it was hard not to read the line as a broader rebuke to those who might sit this one out.

This is a powerful line (read: burn), basically lumping together Trump--the homegrown demogogue--and terrorists.