By now you’ve probably heard: The GOP is becoming too regional, too white, too old to compete at a national level. Democrats look like a merging of the cast of Rent and Up With People, while Republicans look like diehard fans of Matlock and Murder, She Wrote. Fine, fine. The GOP needs to win over more Hispanics, young people, suburban women. That sounds perfectly plausible. But what does “win over” mean? To listen to many pundits and analysts, it means Republicans must become Democrats. The GOP has become too socially conservative, and if it wants to win the support of...