In PA and OH, religious conservatives (notably Anabaptists like Amish and Mennonites) can turn the tide of an election, if they are riled up enough to come out and vote. They won't make a big deal out of it. They'll just quietly turn out in droves under the radar screen.
They did so in 2000 out of disgust for Clinton's behavior and although Bush did not win PA, he made it closer than it had been for a while.
They stayed home in 2006 and many thought it was due to Mark Foley, Tom DeLay and other anti-GOP maelstroms blown out of proportion by Democrats and the DBM.
Many conservative religious groups still hold to the idea that religion and politics don't and shouldn't mix and are loathe to stick their necks out into the political arena.
I would bet that Mrs. Clinton's negatives are quite high among religious conservatives, but are they high enough to spur these folks to get out and vote AGAINST her even if they're not enamored of the GOP candidate? I hope so.
If Rudy is the GOP candidate, I hope no Christian in America will vote for him.
A lot of religious conservatives are split on the immigration issue, not being as strident as other conservatives, some actually supporting legalization of illegal immigrants.