White House hopefuls Bernie Sanders and Pete Buttigieg -- riding neck-and-neck in the polls ahead of the next Democratic primary contest -- come under sustained attack on the debate stage from rivals seeking to challenge Donald Trump in November.
Buttigieg, a former mayor of South Bend, Indiana who at 38 is a fresh face on the national stage, defended himself against charges of inexperience and, in a dig at Sanders, urged Americans to elevate a nominee who will "leave the politics of the past in the past."