THE LONG GOODBYEMark Sanford, soon-to-be former Republican governor of South Carolina, fesses up. He wasn’t in Atlanta, nor hiking the Appalachian Trail. I’m sure you’ve heard by now where he was, and why. Watch a major league meltdown in real time . . .http://www.msnbc.msn.com/id/3036677/#31533633E-mails. E-MAILS??!!?? http://www.msnbc.msn.com/id/3036677/#31533984“You have a particular grace and