Adding DC and PR as states
Expanding the court
Green New Deal
Universal Healthcare
College Debt Forgiveness
Except most of those things aren't things he supports. For instance, he's not calling for Universal Healthcare, just fixing the damage that Trump did to the ACA.
Not seeing why DC and PR is a "radical" or "leftist" move. Again, probably not going to happen.
Not seeing college debt forgiveness as radical.... It's actually sound fiscal policy.
Consider this.. How many kids are putting off having a family because they are paying down college loans? This can't really be good for the country in the long term.
None of these were as radical as things FDR proposed. Or LBJ.