Democratic U.S. presidential candidate Sen. Bernie Sanders shakes hands with fellow Democratic U.S. presidential...
Democratic U.S. presidential candidate Sen. Bernie Sanders shakes hands with fellow Democratic U.S. presidential candidates Sen. Elizabeth Warren and Rep. Tulsi Gabbard during the Martin Luther King Jr. (MLK) Day festivities in Columbia, South Carolina, U.S. January 20, 2020. REUTERS/Sam Wolfe