We don’t know the score, but Gingrich has friends who are Democrats.
If the fellow is a cracker jack lawyer and works for a living (needs the money), it just may be that he really, really doesn’t like what has happened to his Democratic Party. There are many dissatisfied Democrats out there who intensely dislike communism and recognize that is BHO2.
He likes to run in elections where there's no opposition.
No doubt this particular lawyer doesn't particularly like the Chicago Way and when he sees it being used in Virginia by Bolling and his running dog lackeys it's just gotta' be galling.
AKA MalcoX II.