Frankly, I'm surprised Wuerl, devout Dem that he is, said anything at all (although you will note that he did not tell her she should not go to Communion or say anything that even implied this). I'd be truly stunned if her own bishop, Niederauer, even goes so far as to say anything.
The problem is that authority in the Church is extended through the bishops. If they refuse to act, while it is theoretically possible for the Pope to go out and do whatever he wants, it's very difficult and in practice usually doesn't occur. I am hoping that one of the other more orthodox and Rome-friendly bishops will address this problem (with both Pelosi and Biden) more forcefully, although what the bishops are doing now to avoid responsibility is simply claiming that unless this person lives in their diocese, it's outside of their control and there's no point in their getting involved. The only exception seems to be Chaput of Denver.
Well, I shouldn't be so negative. This may be a limited positive sign, but it's positive nonetheless, and maybe it means that the bishops are slowly coming to their senses (or getting enough pressure from Rome to make it happen).
Benedict XVI is the pressure being brought to bear. He is a gentle shepherd, but he is absolutely the Church's rottweiler. He can't excommunicate someone in another Archdiocese (he's only the Bishop of Rome), but he is the the “head” of faith and morals for the entire Church. Cannon Law is Civil Law on steroids.
Some bishops have come to realize that shilling for the Democratic Party has not gained them a place at the Democratic table.