Both Catholics and Protestants have large groups who claim to be members but have not entered a church in years. I suspect very few of those who attend either church supported this guy.
You'd be surprised at the number of so-called Christians who go to church every Sunday, who volunteer at Church, who teach Sunday school who voted for Obama because they thought he was a "good man".
The problem is that America has been so desensitized to the issue of abortion, and we have sat idly by while an entire generation of Americans have been systematically slaughtered in innocuous little abortuaries in strip malls and office buildings that we no longer consider it a "sin".
I'd venture to guess that there is no real difference between number of Catholics and Protestants who go to church every Sunday and who voted for Obama and the Catholics and Protestants who rarely go to Church who voted for Obama. It's about 50/50.
Welcome to Laodicea:
And unto the angel of the church of the Laodiceans write; These things saith the Amen, the faithful and true witness, the beginning of the creation of God; I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot. So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth. Because thou sayest, I am rich, and increased with goods, and have need of nothing; and knowest not that thou art wretched, and miserable, and poor, and blind, and naked: (Revelation 3:14-17 KJV)