His time as governor was an exercise in class distinction and privilege.
If this was the 1950s or 60s, he would be a Republican, a part of the East Coast establishment known as Rockefeller liberals.
What means is they wouldn't be opposed to social programs in principle, but wouldn't have much interest in making them work really well. In fairness, a lot of Dems (and esp. LBJ) wanted to get the bill out of the door, and then forget about it. You simply can't do that with big programs. They always need work.
IOW, do we want someone who is basically Republican? The Establishment, regardless of label, has (during my life) been strongly opposed to Progressive reform. IOW, his core concern is still about class privilege, in my distinctly unhumble opinion. (IMUO)
From where I sit, he's a big step in the wrong direction. Still, tons better than Trump, but among the candidates, I put him in the least desirable category with Gabbard, Yang and Biden.
His being there is going to suck support from Biden, and the others like him. I'm worried this could make a barroom free for all more likely. That could damage the chances of winning the actual election.