Actually, John Edwards did not LEAVE his wife. The affair w/ Rielle Hunter took place during the 2008 campaign.

But remember....Elizabeth was 'in remission' at the time.

As for Newt Gingrich, yes I believe he did leave his wife for Callista who IS his current wife...but hadn't heard that Mrs. Gingrich #1 had cancer.

To be honest not that it guarantees anything but I think it's pretty clever of Newt to talk about all this now, then if he DOES run there's very little if anything that can be made of it during the campaign. Sort of like Clinton trumping the infidelity thing (thanks to ALOT of help from Hillary) in January of 1992 - with that post-SuperBowl interview on 60 Minutes.