Just to clarify the situation, the Catholic Church follows Scripture on these matters, specifically, 1 Corinthians 11:27-29.
As so many others have already pointed out, Pelosi may attend Mass where she will hear Scripture read but, like others in her mindless situation, might feel embarrased to not go up for communion. Hence, the Church views this as unworthy reception of communion. Specifically, a person who eats and drinks unworthily is guilty of profaning what is holy. In the above passage, St. Paul warns that "Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of profaning the body and blood of the Lord." While we cannot reasonably expect that every Eucharistic Minister of Holy Communion can deny her communion (they have no way of knowing whether or not she repented of her sin), we do have the assurance that God knows. In essence, she excommunicates herself, 'latae sentiae' (by her own accord).
So, she may or may not attend the table based on her own cognizance. Should she attend without having first repented, she may be given the Sacrament by Ministers unfamiliar of her situation, she’s still apart from God and in excommunication by her own accord.
I think I understand that now. I want to thank you, and all who have responded, and put up with one trying to understand a somewhat complicated issue. Your tolerance of my persistence is greatly appreciated.