That's unfair. While I think Mormonism is a little weird too, most of the nuttiest interpretations of it aren't any more fair then Dan Brown's views on Catholocism. It's certainly not scientology nutty.
For one thing, the Mormon church actually does quite a bit of philanthropy and such things, while Scientology is nothing more then a money making enterprise.
Mormons in public life have a long track record of competence and hard work, and most that I know that have served in elected office have done an above average job. In public office, they have exhibited no weird behavior on account of their religion that I have ever seen. Quite the contrary.
I'd have no more problem voting for one anymore then I would voting for a Jew or some other religion with a respectable record in the public arena.
I admire Mormons for their hard work and commitment, but the religion is pretty weird.
They believe that Jesus was once a human like us and was 'promoted' to God status. If we humans buckle down and do the right things, then we get similar promotions, and eventually we can get our own planet to populate.
That said, I wouldn't refuse to vote for someone because he was a Mormon. I'd vote for an anti-abortion Mormon ahead of McCain or Giuliani any day!