This is a great and profoundlty Catholic idea.
The Holy Community has two aspects (think of them as the two planks of the Cross). One is communion with Jesus Christ through His body and blood of the Sacrament. The other is with the fellow Catholics, on earth and in heaven, the entire Catholic Church.
Christ calls us to reconcile with your brother before bringing gifts to the altar (Mt 5:24). This has an implication that if one is an unrepentent assistant to murder, like the Madame Speaker, then communion with her is an impossibility. People should demand her excommunication, mark the parish where she receives her condemnation as unclean, and urge others to receive elsewhere.
You mentioned the Church Militant and the Church Triumphant but forgot the Church Suffering. Don't fail to remember those souls in purgatory.