“...if Bernie wins, then we get a 47 state landslide, plus a down ballot catastrophe nationwide for Dem reps and senate candidates, and we win control of both, ...”
A lot can happen between now and November. E.g. (1) A bad recession caused by corona virus. (2) Lots of people dying due to corona virus. (3) Other unpredictable stuff.
The media will blame Trump for every bad thing that happens (see Katrina) 24/7.
Whoever the D’s nominate could end up the last man standing. So their selection could make a big difference.
There is a difference between Bloomberg and Sanders. Not so sure there’s any real difference between Sanders and the others except that Sanders is honest about what he is and what he stands for.
Maybe the best choice would be the D who is most likely to cause a brokered convention.
Bloomberg would be more dangerous if he actually got elected.
Bernie would get nothing done—he would just yell a lot.
Bloomberg could turn the country into a nanny state nightmare.