The current state of American politics presents a paradox. On the one hand, survey after survey testifies to the rock-bottom standing of the Republican Party. Fewer Americans identify with the party than in the past, and fewer trust it to deal with the country’s problems. On the other hand, there are hard-to-ignore signs of a conservative resurgence. A 15,000 person Gallup survey out today shows that 40 percent of Americans now identify themselves as conservative (up from 37 percent at the time of Obama’s election), while only 20 percent regard themselves as liberal (down from 22 percent). Far more independents (35 percent) consider themselves conservative than was the case a year ago (only 29 percent).

These findings would be less compelling if they were not linked...