60 SC House Republicans Call on Governor to Resign
A letter asking the GOP governor to leave office was delivered to Sanford shortly after noon Wednesday.
It follows one sent a day earlier by House Speaker Bobby Harrell asking for Sanford's resignation.
Any move to impeach the governor would begin in the House, which has 72 Republicans, 51 Democrats and one empty seat.
Calls for Sanford to resign or be impeached have grown since June, when he returned from a secret trip to Argentina and revealed a yearlong affair with a woman there. The State Ethics Commission is investigating his travel.
Sanford has said he has no plans to quit. He has been seeking traction for his legislative agenda in his final 16 months in office.