A half century after the nation struggled over whether a Catholic could serve in the White House, a question is lurking in the Republican race for president:

Can a Mormon?

Mitt Romney won the Iowa and New Hampshire nominating contests, adding to a growing sense that the lifelong Mormon will be the candidate to take on President Barack Obama.
If Romney’s momentum is halted, South Carolina is the likely place. Evangelicals made up 60 percent of the Republican vote here in 2008.