- Gibbs Knotts: For victory on February 20, candidates will have to navigate three key groups of Republican primary voters
- He says endorsements matter in a state with long history of picking eventual nominee
- Gov. Nikki Haley's nod to Sen. Marco Rubio a big plus for him, Knotts says
Gibbs Knotts is professor and department chair of political science at the College of Charleston.
(CNN)There's no magic formula to winning the South Carolina GOP primary, but for the best shot at victory February 20, candidates will have to navigate three key groups of Republican primary voters.