re: #1 NO SMOCKING GUN!
Historically, if you’re under 25, you’re less likely to vote than any other demographic group. Older folks are the most likely to vote. Sanders might capture more of that young vote, but if they’re not turning out in numbers, it doesn’t matter. He wont win.
We know that everyone else is splitting the moderate vote - and that a majority of Democrats are voting for someone other than Bernie. They haven’t coalesced around a single candidate, and in a straight up 1-1 fight, I think Bernie loses handily against whoever it is.
And then Bernie will do what he did in 2016 and screw over rank and file Democrats and throw a hissy fit.