When ever anyone receives the Eucharist in the state of sin, they have an ex-officio excommunication. Publicly supporting the freedom to choose to kill the unborn is a sin; hence, she is already excommunicated and only compounds her sins in the face of God and the Church. Eternity is a very, very long time and God is watching.
These politicians either do not believe in the real presence, and therefore should not present themselves for communion, or are purposefully committing a sacrilege against the body of Christ. They will receive their just reward but so will those who did not defend Him.
“Communion” means being one with the Church and God's people of the Church along with the angles and saints. Saying “amen” is an oath that one is in communion with the Church and agrees to its articles of faith. Whomever was responsible for catechizing Nancy Pelosi was probably busy preaching liberation theology—the parent of Rev. Wright's “black theology.”