Former vice president
Former mayor of South Bend, Ind.
Senator from Minnesota
Senator from Vermont
Billionaire business executive, activist
Senator from Massachusetts
Senator from Colorado
Former mayor of New York City
Former representative from Maryland's 6th District
Representative from Hawaii's 2nd District
Former governor of Massachusetts
Founder of Venture for America
Two candidates dropped out after the debate qualification announcement: Marianne Williamson on Jan. 10 and Sen. Cory Booker on Jan. 13.