I dont have any issues with a Christian voting for a Mormon for president.
While I dont know about the way Mitt tends to flip-flop on some important issues....I would not bring up his personal religion in the election.
While I believe the religion of Mitt to be in error, I would not allow him to teach at my church , not even to 3nd graders.
Im not the type of Christian that would vote against a guy just over his personal faith.