Sen. Rand PaulRand PaulSheriff Clarke denies plagiarism report, calls reporter a 'sleaze bag' GOP talks of narrowing ‘blue-slip’ rule for judges House votes to expand death penalty for police killings MORE (R-S.C.) will also be in the state to fundraise for Rep. Jeff Duncan (R-S.C.).

It's unclear how much help Haley could be in a presidential primary, however. She's faced less-than-stellar approval ratings within the GOP and her endorsement of Mitt Romney in 2012 did little to help his campaign there.

Haley is facing what looks to be a tough challenge from South Carolina state Sen. Vince Sheheen (D), who ran a close race against her in 2010.