There are many Catholic candidates, Dems & Reps, who claim to be good Catholics, but then vote contrary to what the Church believes & teaches. They do so openly & conspicuously. Take Giuliani, living with Judy without benefit of an annulment being refused Communion by Cdl. Egan.

Candidates from all stripes use their faith to garner support from the Faithful. They already know, OR SHOULD KNOW, the rules before presenting themselves for Communion. And yet, they present themselves anyway. It is up to the candidate to refrain, rather than a member of the Clergy to stop them. They are playing this game more the than priests & bishops.