“Will evangelicals turn out in large numbers and be energized as volunteers and financial supporters of Mitt Romney? It just takes a few million evangelicals to choose to not get as actively involved in this race to cost Mitt Romney the presidency,” according to evangelical journalist Warren Cole Smith.

“Mitt Romney has studiously avoided the subject of religion whenever possible. He’s a technocrat. He’s very careful. He’s highly managed in his public presentation. He knows that bringing up Mormonism conjures a host of associations he’d like to avoid.”

“I would say that Mormon culture, Mormon doctrine, Mormon belief have been well outside the mainstream of both American culture and Christian culture for many years.”

His speech on religion was one of the defining moments of the 2008 presidential campaign. Revisit analysis of what Republican president candidate Mitt Romney had to say about his Mormon faith and religion in America.

"South Carolina is really shaping up as a make or break last stand for social conservatives," says David Gibson of Religion News Service.

Evangelicals are a key Republican constituency, especially in the primary season, and they still appear to be up for grabs.

Watch excerpts of three leading Republican presidential candidates talking about religion.

Young Mormons are pursuing their educations and careers “not with the purpose of delaying marriage, but with the idea that we want to have a full life that includes all of those things,” says Beverli Jo DeWalt, a single Mormon woman.

"The [Mormon] church has become a worldwide church and its interests now extend far beyond Utah, and it has to meet the expectations of its worldwide audience," says Ron Mortensen, founder of the Utah Coalition on Illegal Immigration.

Watch excerpts from former Massachusetts Governor Mitt Romney’s June 3, 2011 speech to the Faith and Freedom Coalition in Washington.