FEBRUARY 13, 2012 Santorum’s Turn By The Editors At the moment Rick Santorum appears to be overtaking Newt Gingrich as the principal challenger to Mitt Romney. Santorum has won more contests than Gingrich (who has won only one), has more delegates, and leads him in the polls. In at least one poll, he also leads Romney. It isn’t yet a Romney–Santorum contest, but it could be headed that way. We hope so. Gingrich’s verbal and intellectual talents should make him a resource for any future Republican president. But it would be a grave mistake for the party to make someone...