by Mark Silva and updated
Gov. Mark Sanford has come clean.
Not only was he not hiking on the Appalachian Trail -- but rather cruising around Argentina -- during his recent disappearing act.

The Republican governor of South Carolina also has been having an affair during the past year, he acknowledged today, just returned from his South American adventure. He said he had wanted something more "exotic'' than an Appalachian hike.
"It began very innocently,'' the governor said of his affair with an Argentine whom he had known for eight years. Their "remarkable friendship,'' during the past year, "sparked'' into something else, he said, and he has seen her three times since "that sparking thing,'' His wife, he said, had known about it.
There goes another potential 2012 contendor
The Republican who had been viewed by some as a prospective candidate for president now is stepping down as head of the Republican Governors Association.
David Johnson, an Atlanta-based Republican pollster and strategist who campaigned for Bob Dole's presidential bid, says scandals such as Sanford's and Sen. John Ensign's recent admission of an affair mean that candidates such as Mitt Romney, Newt Gingrich and Mike Huckabee, "who were considered by some as boring and shopworn, may get another look for 2012,'' and could also draw more attention to Govs. Haley Barbour and Bobby Jindal, and Sen, John Thune.
Sanford, a married father of four, whose wife could not account for his whereabouts during the Father's Day weekend, emotionally apologized to his wife, staff and others after returning today from Argentina.
"What I have found in this job is that one desperately needs a break from the bubble,'' Sanford said today in a somewhat rambling confessional that started with a fond reminiscence of his hiking trips, explaining the trail ruse.
"I'm a bottom-line kind of guy,'' he said at a news conference. "I'll lay it all out, and we'll let the chips fall where they may.''
Calling his four sons "jewels and blessings'' whom he has let down, the governor said he had let his staff down as well - and he fended off tears as he apologized to longtime friends who have helped him get where he is in politics today, and he apologized to "people of faith'' in his home state and across the country.
"I've let down a lot of people - that's the bottom line,'' the governor said. "If you were to look at God's laws, they are in every instance designed to protect people from themselves... The biggest self of self is indeed self. Sin is indeed grounded in this notion of what is it that I want, as opposed to someone else.''
"The bottom line is this: I have been unfaithful to my wife,'' he said. The relationship started with "casual email back and forth,'' but then "recently over this last year developed into something much more than that... I hurt my wife, I hurt my boys... I hurt a lot of different folks... and all I can say is that I apologize.''
His staff had said the governor was hiking on the Appalachian Trail, decompressing from a rough legislative session.
The former congressman had made news with his unsuccessful fight to reject federal stimulus spending for his state's schools.
Now he has another sort of headline going.
Sen. Lindsey Graham (R.-S.C.), a friend of Sanford since his first congressional campaign in 1994, said today that "the Sanford family needs time and space to work through their challenges. I hope they are afforded that opportunity... As for the future, I hope Mark will reconcile with his family and can continue serving as our state's governor."
(South Carolina Gov. Mark Sanford and wife Jenny, pictured above, at a White House dinner in February hosted by President Barack Obama. Photo by Pablo Martinez Monsivais / AP. Sanford, pictured with family below, took the oath of office after reelection in 2006. AP file photo. )
