Probably Episcopalian. If she were Catholic, she would have identified herself as so. You’ll never see, for instance, Nancy Pelosi call herself “Christian,” no matter how hard she tries to wrap herself in religion. Non-Hispanic Catholics often come from areas where liberal Protestantism is the dominant form of Christianity, so liberal heretics think it speaks more to say they’re Catholic.
Not seeing a lot of Episcopalian churches open 6 days a week either.
Wouldn’t surprise me though.