De Blasio says 'I am standing with Bernie because he stands with working families, and always has... Bernie is the candidate to take Trump on and take him down'

Candidates lambaste billionaire rival for trying to buy his way into White House, raise questions about his commitment to racial equality

Vermont senator benefits from crowded and fractured primary field; Buttigieg, Klobuchar, Biden together draw support from over 50% of New Hampshire voters, twice as much as Sanders

Amy Klobuchar surges into third place in Democratic primary with 20 percent, pushing past Warren and Biden, who both fail to clear 10 percent

Democrats' Iowa frontrunners Sanders and Buttigieg look to cement their momentum in nation's first primary

Vermont senator is favorite to win the New Hampshire primary, but some worry Trump could successfully portray him as a dangerous communist in an election showdown

Asked by IfNotNow anti-occupation activist why he won't skip event, US presidential candidate says he intends to convince attendees to change their attitudes

Candidates crisscross state in final push for votes in decisive White House primary; Sanders and Buttigieg lead the pack

February 11 primary sees Bernie Sanders and Pete Buttigieg battling to retain Iowa momentum while Democratic Party struggles to project unity

Candidates say no evidence hit on Iranian general was necessary; Sanders and Buttigieg fend off attacks after leading Iowa caucuses