Charles P. Pierce discusses how Romney-Ryan each have a problem with their respective religions:

“Much will be made of the fact that the Republican party, with its Bible-banging sectarian political base, has nominated a presidential ticket that includes both a Mormon and a Roman Catholic, which would have been unthinkable, oh, eight months ago, and still would be unthinkable, had the Mormon not possessed more money than anyone’s God, and had the Papist not been the poster child for magical-thinking conservative economics. This will be seen by the more gullible of the people out there as proof that the party is “moving beyond” the influence of the Dixiecrat snake-handlers… In reality, however, it is more a vivid demonstration that the Republican party’s One True Faith is in its desire to shove even more of the nation’s wealth upwards in the general direction of Willard Romney and, thence, in the general direction of Switzerland or the Cayman islands. To that end, the party eagerly would line up behind Asmodeus/Nero ’12 for the upcoming stretch drive…” 

— Why Romney’s Mormon Thing Matters (Ryan’s Catholic Thing, Too)