Oh boy, don't know where to begin. Granted this isn't so full of absurdity, ignorance and bad posts as it is info that just needs more clarification for the most part. I'll start here:
Some Protestant sects don't consider Catholics Christian.
Well that depends on how we're defining "sect". Might be true for the First Baptist Church of Podunk County South of Mason Dixon and plenty of churches that are basically cults and consider just about all other Christian denoms to not be Christian either (think of Westboro Baptist or that Koran burning guy in Florida), but there is no actual serious Christian denomination that holds a theology stating Catholics are not Christians. Even the Seventh Day Adventists, who formed under a rather anti-Catholic theology (that Sunday worship is the mark of the beast, and that the Catholic Church is responsible for distorting this and misleading God's people), don't hold to this view, granted they've deemphasized most of the anti-Catholic stuff in the last century and hold it only nominally now, but even their founder said in one of her writings that she admits there might be true followers of Christ in the Catholic Church, even if misled. Bob Jones University, Jack Chick and the like aren't affiliated with any real denominations.
Now there is no Catholic voting bloc. There never really has been either, but there certainly isn't now. The Catholic vote is so bellwether that it went Gore-Bush-Obama in the last three elections, and in fact the last election it probably deviated from the popular vote winner is 1968, and even then it was probably pretty close in a pretty close election. Prior to that you'd have to go back to...1928. Even if Catholics were a unified bloc, both tickets are the same in that they are led by a non-Catholic with a Catholic as VP so this is basically the biggest non-factor ever.
I've always found the idea that evangelicals are staunchly anti-Catholic as a rule to be largely an invention of Catholics with a persecution complex and secularists trying to make evangelicals out to be even more bigoted then they really are, and I'd say that Rick Santorum's campaign provides quite a bit of evidence in favor. The only anti-Catholic evangelicals I've ever met have been either A) ex-Catholics themselves and likely bitter in the same way Catholics turned mainline/other religion/nothing usually are and/or B) liberal evangelicals that are against the church due its policies on women and gays. Granted I'm not the top guy to talk to for the opinions of conservative evangelicals, but once again, please look toward Rick Santorum's campaign.