The Republican presidential field has produced a lot of babies. There is Mitt Romney, father of five sons. Ron Paul, an obstetrician by training, is also a father of five, and his campaign Web site credits him with bringing 4,000 babies into the world. Newt Gingrich and the recent dropout Rick Perry have only two children each, but Rick Santorum, who has said contraception is “not O.K.,” has seven children, and so does another former candidate, Jon M. Huntsman Jr.

And so far as I can tell, evangelical Christians in South Carolina, who will most likely constitute a majority of voters in Saturday’s primary, don’t think this über-fertility is at all strange. Support for Mr. Santorum may show that Protestants are no longer as troubled by the Roman Catholic objection to birth control.

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