I blame gay marriage.
South Carolina Gov. Mark Sanford says he's been having an affair with a woman from Argentina and will resign as head of the Republican Governors' Association.
The married father of four emotionally apologized to his wife, staff and others at a news conference after returning Wednesday from a trip to Argentina that followed a dayslong absence. His staff had said the Republican was hiking on the Appalachian Trail.
Sanford says he met the woman about eight years ago and it became romantic about a year ago. He says his wife and family have known about it for the past five months.