Rep. Mark Sanford (R-SC) attends a picnic for members of Congress hosted by U.S. President Barack Obama at the White House in Washington September 17, 2014. Sanford and his former wife have agreed to go to mediation over the latest spat arising from their divorce in 2010 after his extramarital affair while serving as the state's governor, a judge said on Monday. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS)