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Donald Trump, presumptive 2016 Republican presidential nominee, left, greets his wife Melania Trump during the Republican National Convention (RNC) in Cleveland, Ohio, U.S., on Monday, July 18, 2016. Republican factions trying to stop Donald Trump's nomination noisily disrupted a vote on party convention rules, displaying the fissures in the party on the first day of its national convention. Photographer: Daniel Acker/Bloomberg via Getty Images

Donald Trump, presumptive 2016 Republican presidential nominee, left, greets his wife Melania Trump during the Republican National Convention (RNC) in Cleveland, Ohio, U.S., on Monday, July 18, 2016. Republican factions trying to stop Donald Trump's nomination noisily disrupted a vote on party convention rules, displaying the fissures in the party on  the first day of its national convention. Photographer: Daniel Acker/Bloomberg via Getty Images