Reporting from Des Moines — Republican presidential candidates wooed evangelical voters Saturday, seeking the key voting bloc's backing by highlighting their faith and trying to chip away at the credibility of their rivals.

Businessman Herman Cain's recent surge in the race was evident — the other candidates turned on him repeatedly, particularly on the topic of abortion. Last week, Cain said that though he opposed abortion under any circumstances, such a decision should be made by the mother or the family and not the government. (He later said he misunderstood the question.)

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