Mark Sanford , the former South Carolina governor and congressman whose political rise was overshadowed by a widely publicized extramarital affair in 2009, is seeking a return to Congress . Sanford filed paperwork just ahead of the deadline to run in the June 9 Republican primary for South Carolina’s 1st Congressional District, a seat he has held twice before. The 65‑year‑old enters a crowded primary for the seat currently held by GOP Representative Nancy Mace , with a familiar message centered