Hey, Buffalo, NY is a HEAVILY Catholic community, VERY heavy, and look at the red/blue map of NYS and see how they voted, just like they do EVERY year.
For that matter, here’s an interesting link for your consideration.
USA - Statistics by Province by Catholic Population
http://www.catholic-hierarchy.org/country/spcus1.html
If the Catholic population in these major cities in these big states voted according to official Church position, yeah, you’d better believe that it would have influenced the elections. It’s the cities that carry states like CA and NY and make them blue.
Red/blue map for president.
http://elections.nytimes.com/2012/results/president
Red/blue map for house. (Shows breakdown better. You can locate virtually every city in the country by where the blue areas are.)
http://elections.nytimes.com/2012/results/house