Trump's Biggest Threat to the GOP: Running as a Third Party Candidate

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Donald Trump ranks third in a hypothetical three-way race with Jeb Bush and Hillary Clinton – but he steals enough voters from Bush to pave the way for a Clinton landslide. How have other Republican candidates like Rick Perry and Lindsey Graham attempted to stay relevant by flying in Trump’s orbit? And is Trump a credible threat to the GOP? Find out on today’s @MTP.