Coruscation

Furthermore, he has an unconservative faith in his own innocence. The crossroads where government meets enterprise can be an exciting crossroads. It can also be a corrupt crossroads. It requires moral rectitude to separate public service from private gain. Gingrich was perfectly content to belly up to the Freddie Mac trough and then invent a Hamiltonian rationale to justify his own greed.

Then there is his rhetorical style. He seems to have understood that a moderate Republican like himself can win so long as he adopts a bombastic style when taking on the liberal elites. Most people just want somebody who can articulate their hatreds, and Gingrich is demagogically happy to play the role.

Most important, there is temperament and character. As Yuval Levin noted in a post for National Review, the two Republican front-runners, Gingrich and Mitt Romney are both "very wonky Rockefeller Republicans who moved to the right over time as their party moved right."

But they have very different temperaments. Romney, Levin observes, has an executive temperament -- organization, discipline, calm and restraint. Gingrich has a revolutionary temperament -- intensity, energy, disorganization and a tendency to see everything as a cataclysmic clash requiring a radical response.

I'd make a slightly similar point more rudely. In the two main Republican contenders, we have one man, Romney, who seems to have walked straight out of the 1950s, and another, Gingrich, who seems to have walked straight out of the 1960s. He has every negative character trait that conservatives associate with '60s excess: narcissism, self-righteousness, self-indulgence and intemperance. He just has those traits in Republican form.