<< It's probably some extra who is the mole. I suspect Palmer's wife is hiding something, actually I've suspected her for like 2/3 of the show. >>
It's pretty obvious Palmer's wife's a bitch, but I don't think she has anything to do with the conspiracy. She's out to gain power, and will do anything to protect that. I'm sure she's setting up that other broad to hook up with Palmer so she can "catch" them in the act and use that against Palmer in case he ever decides to divorce her. Obviously, a "no no" on a presidential campaign.
The mole better not be some new or supporting character. They've built this up for a while now and they seem to be advertising it as "the big secret," so it better be someone we've seen a lot.
I sincerely hope it's none of Mason, Tony, or Nina.