Every party in opposition goes a little crazy. For Republicans in the early Obama era, insanity took the form of the Sarah Palin spasm. Veteran politicos took the former Alaska governor seriously as a national figure. Republican primary voters nominated the likes of Todd Akin, Christine O’Donnell and Sharron Angle. Glenn Beck seemed important enough to hold a big rally at the Lincoln Memorial.

Fortunately, serious parties eventually pull back from the fever swamps. That’s what’s happening to the Republican Party. It has re-established itself as the nation’s dominant governing party. Republicans now control 69 of 99 state legislative bodies. Republicans hold 31 governorships to Democrats’ 18.

When the next Congress convenes in January, Republicans will have their largest majority in the House of Representatives since 1931; they will have a majority in the Senate, dominate gubernatorial power in the Midwest, and have more legislative power nationwide than anytime over the past century.

Republicans didn’t establish this dominant position because they are unrepresentative outsiders. They did it because they have deep roots in four of the dominant institutions of American society: the business community, the military, the church and civic organizations.