Take the illegals out of the equation and Romney would have won the Catholics going away. Romney beat Obama by 19% among Catholics that actually go to church on a regular basis, as in white Catholics.
In other words, more than 40% of faithful, white, church-attending Catholics are still abortion-advocating Obama supporters, rendering them latae-sententae excommunicated right out of the gate. What percentage out of 70 million do you think remains? I arrived at a figure of 7%.