It would be foolish for anyone to take Sanders lightly, myself included. But what Trump has built in terms of momentum, accomplishments, and unity within his own party are too much for a divided, broken, and desperate party to overcome. Incumbents rarely lose, but if it's Sanders v Trump then it will all but guarantee the conversation will be capitalism v socialism/communism at every debate.
That's a conversation Bernie can't win.
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So... he really is Trump?