How many of Democrats, Progressives think this is a real possibility come November 2020?

First of all, are you aware that millions of Bernie supporters sat out the 2016 election?

All three below are high possibilities in Nov 2020 because of Bernie's ongoing crazy personal ambition misadventure:

1. If Bernie is nominated, millions of moderates, independents, Democrats will sit out 2020
2. If Bernie is not nominated, many Bernie supporters will sit out 2020
3. In either scenario, Trump will be re-elected in Nov 2020

The damage is already done. The benefactor is Trump. I will be here in November 2020 to remind the Bernie fanatics of what they were playing with.

This question is primarily for Democrats and Progressives. Not Far Left Bernie Supporters.

But I know Bernie supporters will not debate the issue but shoot the messenger as usual.