@hightor,
This issue and others suggest a wider disconnect between the new far left Democrats and the voters. In the current era of avowed socialism coming from many prominent Democrat spokesmen, this is not likely to be the last illustration of this divide.
Biden is busily embracing these new Democrat values (if not their avowed policies) and has somewhat degraded himself in the process. He's offering the odd proposition that he can reject much of his past but remain, because of it, the best qualified candidate for the Presidency. I suspect this is a fairly widespread impression among many voters.
On a larger scale this is indicative of a continuing divide in the Democrat Party. Will the Democrat leadership be able to both unite the party and put together a platform that can actually lead to victory in the forthcoming Presidential and Congressional elections? So far all among them appear to be saying the right things about unity, but the real test will come as they work to put together a coherent platform. Nancy Pelosi is a seasoned, effective political leader, but this may be a very difficult process for her.
I suspect the recent example of President Trump actually, and very visibly, working hard to enact the very things he promised in his campaign (even in the face of some opposition within his own Party), may raise the difficulty for all such platforms, in that many voters will now interpret them as real precursors for action. This will be a problem for both parties, in that there are divisions in both : however, more so among Democrats. Two reasons here; (1) The Republican platform is already visible and for the most part tested, and with very good economic results. (2) The combination of a continuing implacable opposition of Democrats in the Congress, and the emergence of strident far left voices among Democrats has gone a long way to uniting Republicans against a common enemy.
My impression is that Biden and Kamila Harris are the strongest of the current Democrat candidates. Most of the others, from Sanders & Warren, and on to Beto, Butticieg, Booker and others, have either fatally flawed themselves or simply faded fast in the spotlight. It is interesting that Harris has been particularly vague and ambiguous about endorsing the far left proposals of some of her colleagues - probably a very canny move in view of the tumult ahead for the Democrat Platform.