Trump Candidate Dr. Oz Blasted As 'Walking Massive Fraud' In PA Dead Heat

The rift between the MAGA and “Ultra MAGA” wings of the GOP is deepening as extremist candidates continue gaining traction with voters across the nation. Meanwhile, the power of Donald Trump’s endorsements is being put to the test as primary voting begins in several states. MSNBC’s Ari Melber is joined by political strategist James Carville to discuss.
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