House Speaker Paul Ryan, the GOP's 2012 vice presidential nominee, said Thursday that he was "just not ready" to endorse presumptive Republican presidential nominee Donald Trump. Mitt Romney, the party's 2012 presidential nominee, reportedly plans to skip the GOP's July convention — an unusual one-two snub for a new party standard bearer. Trump responded by saying he was "not ready to support Speaker Ryan's agenda," but hoped he and Ryan could work together on "what is best for the American people."

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