Hillary Clinton Wins South Carolina Democratic Primary

Democratic presidential candidate Hillary Clinton greets supporters as she arrives to speak to supporters at her election night watch party for the South Carolina Democratic primary in Columbia, S.C., Saturday, Feb. 27, 2016. AP Photo/Gerald Herbert

Democratic presidential candidate Sen. Bernie Sanders, I-Vt., raises his fist in solidarity with the audience while speaking during a campaign rally at the Verizon Theatre in Grand Prairie, Texas, Saturday, Feb. 27, 2016. AP Photo/Jacquelyn Martin