I've read about exposing WH and OW when they work together and Brits Brat letter to HR. My situation is a little different.

The OW and WH work in politics on local campaigns. OW is a campaign manager for a local candidacy and WH was a consultant for her competitor in the primary. I found out about A when I saw my husband's e-mails. He saved IM logs, one of which was him saying that he was willing to SPY for her candidate and give her any information they need (shows how completely obsessed he was to try and win her over). She told him not to. In the meantime, a deal was made and the 2 primary candidates joined forces. I think (not sure b/c of husband's lies and our separation) that he is either consulting for her now or is just volunteering at her campaign.

Anyway, the point is, I have the phone logs from our wireless bill that show how much she uses her work phone and work cell phone calling my husband. It is pretty crazy. I also know (but don't have any proof) that she had him write a lot of their press releases--just showing how poor she is at her job).
Do you think that it would be beneficial to expose this to her boss? It is politics, so I think it may be taken a little different than the corporate world.

My main point in this would be to get rid of her. My goal would be that she wouldn't be able to get a job in our state's politics and would have to move out of state.

What do you all think?

Yes, I would let him know before some of his political enemies find out and embarrass him publicly. If the politician finds out through you, he can handle the matter privately, which would give him political cover if it did come out.. I think it is even more critical to expose to her boss in this situation than in your garden variety corp positions because she can RUIN her boss with her indiscretion.