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U.S. Sen. John McCain, R-Ariz., speaks to supporters after being declared the winner in the Arizona Republican primary Tuesday, Aug. 30, 2016, in Phoenix. The 80-year-old McCain defeated former state Sen. Kelli Ward and two other Republicans on the ballot. (AP Photo/Ross D. Franklin)John McCain clears a big hurdle in a race that was inundated with questions about Donald Trump.

2016-08-31 00:56:36 -0600

Donald Trump (Getty Images)The GOP nominee accepts an invitation to travel to Mexico City hours before he delivers a speech on immigration.

2016-08-30 23:12:30 -0600

Marco Rubio (Getty Images)Marco Rubio's primary victory sets up a nasty November showdown with Democrat Patrick Murphy.

2016-08-30 22:35:59 -0600