What if Bernie loses? Would millions of leftists (AOC type young ones, and others) refuse to vote for the same old retread Dems? The Jeb Bush and Kasich types of the left?
The Dems need a McGovern, Mondale or Dukakis to thrill and motivate the crowds. /s
And win the Left Coast, NY and a few more but lose the Electoral College.
They will stay home and kill the down ballot.