Christiecrats or Christie Democrats

[Mister Mets]

Booker wouldn't want to risk his political future by backing someone from the other party. Menendez seems like a generic partisan. As are the Democrats in the House. So you probably won't get any significant endorsements there.

Christie's a Senator, so he's unlikely to have the relations with legislators from the other party than McCain and Obama had.

Christie might get endorsements from some Democratic Governors, as they're the folks who would have worked with him most closely. Some of the more moderate members, those who aren't worried about later primaries, might back him.