Well, actually, if they are seriously complicit with abortion, as Biden certainly is, then they are automatically excommunicated. There just isn’t a public announcement of the fact. And if they then go to communion in a state of mortal sin, they are “eating and drinking damnation to themselves,” as the Anglican Book of Common Prayer used to warn.
Rosary beads or not, his soul is in serious danger if he doesn’t repent and confess and amend his life.
As good bishops like Chaput point out, you aren’t doing these guys a favor if you don’t make it very clear to them that they are putting themselves in danger of damnation. I think most of them know it, in fact, but maybe figure they’ll be given time to repent after they retire from office. Good luck with that.