Where to vote

Audience members wait for the arrival of Republican presidential candidate, former House Speaker Newt Gingrich, Friday, Jan. 20, 2012, in Orangeburg, S.C.

AP Photo/ Matt Rourke

The candidates

Nine candidates will be listed on the ballot in alphabetical order, but only four of them are actively seeking the GOP nomination:

Newt Gingrich

Ron Paul

Mitt Romney

Rick Santorum

The following candidates remain on the ballot but have ended or suspended their campaigns for the nomination:

Michele Bachmann , Herman Cain, Jon Huntsman, Gary Johnson, Rick Perry