Former S.C. Governor Eyes House Seat

Will be vacated by Rep. Tim Scott as he moves to Senate

Former South Carolina Gov. Mark Sanford is launching a political comeback that may begin within days.

Sanford is planning to run for the Congressional seat he held almost a decade ago, a Republican source familiar with his thinking told CNN late Thursday.

"He's looking all but certain to do it," said a former top aide to Sanford, who did not want to be identified while prematurely revealing the plans.

A formal announcement will come soon, the source said.