The Dem establishment is kneecapping Sanders in the most obvious of ways, so why are you blind to that? If you understood it, you would have never brought up the possibility of "Trump vs Sanders".
And speaking of destroying parties, Sanders would do a lot worse to the Dems than Trump would to the GOP.
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Imagine if you will, a world where DUmmies get the answer to their dreams in Sanders. Then, like an episode of Twilight Zone, their world collapses when they finally understand THEY have to pay into the pot, just like everyone else.
The gnashing of teeth would be epic.