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Donald Trump says ‘riots’ might happen if he’s denied nomination

03:28

Donald Trump, the GOP front-runner, warned on Wednesday that his supporters could respond with "riots" if he fails to secure the nomination at July's Republican National Convention in Cleveland. This comes after speculation that some Republicans want to nominate House Speaker Paul Ryan at the convention, though Ryan’s spokeswoman says he “will not accept a nomination.” NBC’s Peter Alexander reports for TODAY.