Hartnett Jr. announced his intention to run for the seat in March 2022.[1] The incumbent, William S. Cogswell Jr., opted not to file for re-election to the House.[2] Hartnett defeated Democratic opponent Ellis Roberts in the general election.[3]
Hartnett is a member of the Education and Public Works and Invitations and Memorial Resolutions Committees. He is the son of former Congressman Thomas F. Hartnett who served the state of South Carolina for more than two decades across the South Carolina House of Representatives, Senate, and U.S. House of Representatives.