Former South Carolina treasurer Thomas Ravenel is expected to turn in the 10,000 signatures he needs to run as an independent for U.S. Senate.
Ravenel said he will present the signatures Monday morning at the state Election Commission in Columbia.
Ravenel wants to be on the November ballot for the seat currently held by Republican U.S. Sen. Lindsey Graham.
Ravenel became state treasurer in 2007. But he had to resign months after his election when he was charged with buying cocaine for himself and his friends. He would plead guilty and spend 10 months in prison. He also pleaded guilty to drunken driving in New York in March.
Ravenel has said he is running to reduce the size of government, give people more freedom and to curb U.S. involvement overseas.