Those of us of certain age remember well the Reagan Democrats, mostly white guys with union cards who thought Reagan would be better at running the economy in their best interest. He'd cut their taxes, crack down on Welfare Queens, bring back the good old days, all that.
Today we've got the liberal establishment that wants the good old days of the Clinton Administration back and would prefer that those pesky Progressives stop rocking the boat. There are Republicans circling in the water after all. (Be afraid, be very afraid)
It's hard for them to actually criticize Progressive goals, it's always what they say they want for everyone, but like Reagan Democrats they seem to only want these things for themselves and just choose to believe that things can't be changed. They keep trying to knock down the standard bearer but that turned out to be harder than they thought, so mostly they've been concentrating on disparaging his supporters for refusing to listen to them and saying mean things.