The Democrats storming Nevada in the lead up to Saturday's caucuses faced off in Wednesday's debate, a matchup in a more diverse early state than the first two, with a new wrinkle in the form of billionaire Michael Bloomberg , who took the stage for the first time. Amy Klobuchar, Vermont Sen. Bernie Sanders, and Massachusetts Sen. Elizabeth Warren. The debate, hosted by NBC, MSNBC and the Nevada Independent in the state's epicenter of Las Vegas, brought the presidential contenders in front of a different audience that far more reflects the makeup of the Democratic Party and the country as a whole. But once again absent from the Democratic debate stage, and from the primary's top tier, was a candidate of color -- a somewhat unexpected reality for a party that once touted its most diverse field, even with a still fluid race.