“There can’t be anyone in the district who doesn’t know who he is,” says College of Charleston political scientist Gibbs Knotts.

Given the large field, however, it’s unlikely that Sanford can carry a majority of the vote, according to Knotts. That matters, because if no one wins a majority in the March 19 primary, the two top challengers will enter a runoff April 2. 

http://www.npr.org/blogs/itsallpolitics/2013/01/29/170562708/disgraced-former-gov-mark-sanfords-ready-to-make-another-move