Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, speaks at the King Day at the Dome event on the front steps of the South Carolina State House in Columbia, South Carolina, U.S., on Monday, Jan. 18, 2016. Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, tightened her embrace of President Barack Obama on Sunday as Sanders tried to tie her to Wall Street, in a Democratic presidential debate where leading rivals turned up the volume and sharpened their rhetoric as they faced off for the last time before Iowa caucus-goers cast the first votes in the 2016 election on February 1. Photographer: Patrick T. Fallon/Bloomberg via Getty Images
