Another Republican presidential hopeful, Dr. Ben Carson, is coming to Citizens United's South Carolina Freedom Summit on May 9 in Greenville.
The retired neurosurgeon formed a presidential exploratory committee last week. Carson has been third or fourth in recent South Carolina GOP presidential polls.
Carson will join six other Republicans weighing White House bids in 2016 announced for the South Carolina event.
The include: Louisiana Gov. Bobby Jindal; Sens. Ted Cruz of Texas and Lindsey Graham of South Carolina; former Texas Gov. Rick Perry; former Pennsylvania Sen. Rick Santorum; and Tennessee Rep. Marsha Blackburn.
A similar Citizens United Freedom Summit in Iowa in January helped launch Wisconsin Gov. Scott Walker's presidential bid.
The Washington, D.C.-based political advocacy group said more announcements about the Greenville event are coming.
U.S. Rep. Jeff Duncan, R-Laurens, is co-hosting the summit at the Peace Center.