For the same reason Maine keeps sending rinos to Washington.
They vote for laziness instead of accepting the risk and responsibilities that come with freedom.
Conservatives don’t want Graham in SC but Republicans and Dems do. This has been explained many times on FR but primaries in SC are open so the Dems cross over and put Lindsey in with the help of our own Rinos. Even the state legislature which is heavily Republican votes for tax increases whereby the true conservative governor Haley has to veto them. Many Dems changed parties to get elected and thus we have big spenders in key legislative posts. Also, Lindsey spends a lot of money each election cycle telling all how conservative he is.. a joke on us.