COLUMBIA, SC - JANUARY 18, 2016: A woman holds a portrait of Rev. Dr. Martin Luther King during the King Day at the Dome rally at the S.C. State House Monday, January 18, 2016 in Columbia, South Carolina. The event drew appearances from Democratic presidential candidates Sen. Bernie Sanders, I-Vt, former Maryland Gov. Martin O'Malley and Hillary Clinton. (Photo by Sean Rayford/Getty Images)