COLUMBIA, SC - JANUARY 18, 2016: Democratic presidential candidate, former Maryland Gov. Martin O'Malley greets a parishioner at Zion Baptist Church Monday, January 18, 2016 in Columbia, South Carolina. Following a service honoring Rev. Dr. Martin Luther King Jr. those in attendance marched to the South Carolina State House for the annual King Day at the Dome rally, organized by the NAACP. (Photo by Sean Rayford/Getty Images)