Some black clergy see no good choice between a Mormon candidate for president and one who supports gay marriage. So they're telling their flocks to stay home on Election Day, which is a worrisome message in a tight race.

The pastors say their congregants are asking how a true Christian could back same-sex marriage, as President Barack Obama did in May.

As for Republican Mitt Romney, the first Mormon nominee from a major party, congregants are questioning the theology of the Church of Jesus Christ of Latter-day Saints and its former ban on men of African descent in the priesthood.

In 2008, Obama won 95 percent of black voters. But the nation's first African-American president can't afford to lose any voters from his base.