In the Orthodox Church, we have a series of prayers the we say in the days before we receive Holy Communion. In these prayers, we recognize that we are NOT worthy to receive the Eucharist because of our many sins, and we ask God to make us worthy!
If one does not believe in the Real Presence, one must not receive Communion—for the sake of one’s soul!!!! One must consult with one’s Spiritual Father, who hopefully will give one resources to restore faith in the true nature of the Eucharist!!!
And if one promotes abortion or other grave sins (e.g., homosexuality), one must not receive Communion either!!!!
But as I noted in post #6, this issue gets zero coverage if the politician isn’t Catholic. For example, Michael Dukakis is pro-abortion and Greek Orthodox, and he was the Democrat nominee for President in 1988, I can find zero examples of Orthodox bishops stating he should abstain from communion until he repeats of his abortion-on-demand ideology