A polling station in Columbia, S.C., earlier today (Jan. 21, 2012). Mladen Antonov /AFP/Getty Images hide caption itoggle caption Mladen Antonov /AFP/Getty Images The Two-Way South Carolina Primary: Join Us For Live Updates January 21, 2012 The third major contest of the 2012 Republican presidential campaign is being held today in South Carolina and we'll be live blogging as the news comes in, starting around 6 p.m. ET. Polls close at 7 p.m. ET.