Rick Santorum is rebranding himself. With the bruising 2012 primary behind him and another presidential bid in his sights, the former Pennsylvania senator and famous culture warrior is out with a new book, Blue Collar Conservatives, that puts his longstanding interest in working-class issues at the fore. Defeating same-sex marriage has become reclaiming marriage culture. His new book’s index doesn’t have one reference to abortion, and it’s barely mentioned in the text at all. In Santorum’s much-longer 2005 work, It Takes a Family, several chapters are devoted to abortion. Medicaid goes from one mention in his 2005 book’s index...