I think we should all admit that white Catholics are the most powerful swing voters in this country. The republicans know that the southern evangelicals will always vote for them.
Now in order to win the swing states, the GOP needs to appeal to the "Reagan Democrats" which are essentially white Catholics (who voted for Kennedy, FDR, etc.).
The southern evangelicals may stay home, but then they concede to the half-black Obama and the Liberal Democrats.
Catholic Paul Ryan ensures Romney victories in Iowa, Ohio, Florida, and Wisconsin.
No, because the Catholic vote is now so fragmented that I doubt it will transform into a bloc vote.