Cohen writes,

[My] grandfather would have had a term for Gingrich: luftmensch. This is a wonderfully descriptive Yiddish word for a fellow who has no visible means of support — who lives off the air itself. This, in an updated and very Washington way, is Gingrich. No longer an office holder, not a chief executive, not really an academic, he lives on the kindness of think tanks and the gullibility of strangers. His business is the manufacturing of provocation, at being a troublemaker, a glint of mischievousness in his eyes, a wee smile of inner satisfaction. He is bad. He is good at being bad. He is just not any good at being good.

I think what Cohen is trying to say is that Gingrich should have a regular column in the Washington Post.