But he's running as a Democrat, so if he loses to Hillary in the primaries, he won't steal votes from her in the election.it will only steal from the left
True, but there's infrastructure, momentum and even money that is being raised. These things matter. Perhaps momentum the most. People that may have volunteered for HC, donated to her, and voted for her may at that point only vote for her. That's a big difference. He may end up the VP..... Stranger things have happened. Would he compromise himself as such?
Yes, but all of this is true of any primary challenger. Politicians must compete for resources as well as votes; c'est la vie. Having multiple candidates in a primary is beneficial in spite of its costs.True, but there's infrastructure, momentum and even money that is being raised. These things matter. Perhaps momentum the most. People that may have volunteered for HC, donated to her, and voted for her may at that point only vote for her. That's a big difference.