AB should reply:
“Dear Nancy,
I have a better idea.
I’ll go ahead and participate in the March for Marriage.
But, how about you quit calling yourself “Catholic” since you don’t seem to believe or practice any of the teachings of the Catholic Church.”
Such a letter to Pelosi from the Archbishop would be along the lines of Pope Francis’s recent statement to the effect that half-hearted Catholics aren’t Catholics at all. Nancy has never been a Catholic in the sense of a true believer in the faith; it’s been a political prop to her, and for her use when she deems it appropriate.
If not excommunicated, she should be denied the sacraments. Including “Extreme Unction” or whatever they now call it Last Rites. At 70+ that could possibly, by some outside chance, cause her some concern.