[A.A. Cunningham]

adding that the senator "regularly attends Catholic Mass,"

That wasn't the case in 2010.

Rubio belongs to the Christ Fellowship nondenominational Church in West Kendall, Fla., where he has attended for the last six years.

[Colofornian]

You’re probably right re: the nondenominational attendance...the thing is...a lot — if not most — nondenoms don’t even have formal “memberships”...So Rubio may have never pulled his membership in his Roman Catholic church...and for good reason...it allows him to have a “face” for lots of distinct constituents...