According to a June Gallup poll, 18 percent of Republicans say that they would not vote for a Mormon. But for their part, Mormon GOP presidential hopefuls Mitt Romney and Jon Huntsman are often quiet about their faith. Both know they need the GOP evangelical base, many of whom are fearful of the Mormon Church and don’t believe Mormons are true Christians. The Church of Jesus Christ of Latter-Day Saints recently launched a $4.6 million ad campaign to combat that sentiment, showing members who come from all walks of life. Norman Tolk, a professor physics at Vanderbilt University was featured in one such television spot, talks about his faith and the election. Wes Kosova from Bloomberg Businessweek helps break down the Mormon marketing numbers.