That's an interesting, post, Reg, and I would agree with almost all of it.  But not this:

"Then there is the Bernie Sanders wing, who are just old school FDR Democrats...which hilariously or tragically are now seen as the far left."

There's probably room to disagree, but when I read what was Sanders' platform and also consider comments he as made in the past, it would seem quite clear that he represents a place further to the left than FDR.  Further, the core of his supporters in the Democrat Party almost certainly do.  It's been a a while for remembering well, but I wen through his platform back during the Primaries, and there were a number of issues placed him there.  The other thing is that when he did tack to the center, he didn't do a good job of convincing the public (either Dem or Rep) that he really meant that.  It was widely takes as an insincere smokescreen to gain the nomination.  

Of course, had he gotten the nomination, the backlash would have been strong enough that we might not now be looking at such a close race for the Senate.  So his opportunity to do a lot of that policy would have been restricted.  Instead, with the Georgia runoffs tilting more away from Trump the more he flops around like a beached whale, there may be more room for Democrats to move.  I still think they'd be smart to be incremental and not radically inflame the far right.  Slow and steady wins the race.