WASHINGTON — South Carolina GOP Rep. Trey Gowdy added his name Wednesday to the growing list of committee chairmen announcing they will not seek re-election, saying this is the right time for him to leave politics and return to the justice system. Gowdy is chairman of the House Oversight and Government Reform Committee and will be remembered for leading a two-year investigation into the deadly 2012 attacks in Benghazi, Libya, which focused heavily on Hillary Clinton’s role as secretary of state.