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Delegates hold signs reading 'Trump Digs Coal' during the Republican National Convention (RNC) in Cleveland, Ohio, U.S., on Tuesday, July 19, 2016. Donald Trump sought to use a speech by his wife to move beyond delegate discontent at the Republican National Convention, only to have the second day open with an onslaught of accusations that his wife's speech lifted phrases from one delivered by Michelle Obama in 2008. Photographer: David Paul Morris/Bloomberg via Getty Images

Delegates hold signs reading 'Trump Digs Coal' during the Republican National Convention (RNC) in Cleveland, Ohio, U.S., on Tuesday, July 19, 2016. Donald Trump sought to use a speech by his wife to move beyond delegate discontent at the Republican National Convention, only to have the second day open with an onslaught of accusations that his wife's speech lifted phrases from one delivered by Michelle Obama in 2008. Photographer: David Paul Morris/Bloomberg via Getty Images