The major contenders vying for Senate seat to replace Lindsey Graham

Mark Sanford, former South Carolina governor and congressman, has added his name to the list of Republican candidates hoping to succeed the late Lindsey Graham in the U.S. Senate. CBS News political reporter Zak Hudak has more details.

Mark Sanford, former South Carolina governor and congressman, has added his name to the list of Republican candidates hoping to succeed the late Lindsey Graham in the U.S. Senate. CBS News political reporter Zak Hudak has more details.