COLUMBIA, S.C. -- State Sen. Lee Bright is set to announce officially that he is mounting a Republican primary challenge against U.S. Sen. Lindsey Graham next year.

His campaign says the Roebuck lawmaker is making the announcement Tuesday during a teleconference with reporters.

Bright was elected to the Senate in 2008. Last week, he went up with a website asking people to sign up for his newsletter and promising to send them a video announcement the moment he decides to run against Graham.

Two other candidates are already in the race to replace Graham. Anderson businessman Richard Cash and Charleston businesswoman Nancy Mace agree with Bright that Graham is not conservative enough for South Carolina.

Graham was elected to the U.S. Senate in 2002 after Strom Thurmond stepped aside.