Senator Bernie Sanders is the projected winner of the Nevada caucus, according the Associated Press."In Nevada, we have just put together a multi-generational, multiracial coalition, which is going to not only win in Nevada, it's going to sweep this country," Sanders boasted at a rally in San Antonio, Texas, shortly after news outlets reported his caucus win. Former South Bend, Ind., mayor Pete Buttigieg warned that nominating Sanders could cost Democrats seats in down-ticket races.This episode: congressional correspondent Susan Davis, campaign correspondents Asma Khalid and Scott Detrow.