Biden effortlessly dismisses the nonsense that he is making a racist claim, when he simply reverses the glib market fundamentalist metaphor of "unshackling market forces" by reminding us that deregulation and privatization always actually "shackles" people who have to work for a living, then he goes right back on target pointing out that what is really outrageous is not the phony culture war outrage of the day Republicans try to trash the public sphere with but their actual stated policies and the actually demonstrably disastrously failed outcomes that follow from those policies. It's a joy, I must say, to see Democrats fighting back strong against Republican crap.
But to say one word more about the clumsy effort to pretend Biden was specifically being racist in his reference to Republican policies putting people in chains: There is not a single Republican in office anywhere in the country at any level of governance who does not owe at least some of the vote that put them in office to white racism. This doesn't make every Republican a racist, but it makes every Republican beholden to white racism in America. An anti-racist Republican would concede, deplore, and actively work against this reality, not pretend it's racism when anti-racists recognize racism, not cleverly ascribe racism in a racist society (a strategy that is undeniably racist itself) to those whose anti-racism make such a charge discomfiting in ways that disadvantage them.
Also: from my Dispatches from Libertopia: "LXXIII. The intolerant always demand tolerance for their intolerance. Bigots always decry as violence and as bigotry the restraint of their bigotry from the worst of its violence. Racists always declare racist the exposure and denunciation of their racism. This is all very clever, if you are very stupid."