Democrats who try to convince themselves that Joe Biden will not be beholden to the leftists in his party are fooling themselves.
He is too personally weak to stand up to them. He will be surrounded by them in his administration. And he needs them to pass legislation.
They are going to own him, and Alexandria Ocasio-Cortez knows it. And remember, Biden is a liberal: His views are not that far off of those of Bernie Sanders et al.