Some black clergy see no good presidential choice between a Mormon candidate and one who supports gay marriage, so they are telling their flocks to stay home on Election Day. That's a worrisome message for the nation's first African-American president, who can't afford to lose any voters from his base 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.

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