Bernie Sanders has won the New Hampshire Democratic primary contest, on a terrible night for former vice-president Joe Biden. The left-wing senator took a tight victory over centrist former mayor Pete Buttigieg, who offered a different Democratic vision in the race to take on President Trump in November. Mr Sanders declared the night "the beginning of the end" of Mr Trump. Success in New Hampshire - like Iowa - offers momentum for the race ahead. Finishing behind Vermont senator Mr Sanders were two moderates - Mr Buttigieg and Minnesota senator Amy Klobuchar, who emerged as a surprise contender by taking third place. Massachusetts senator Elizabeth Warren and Mr Biden - two erstwhile frontrunners - finished in fourth and fifth places. Technology entrepreneur Andrew Yang and Colorado senator Michael Bennet both dropped out of the race. Although President Trump faces a long-shot challenger in the Republican primaries he is almost certain to win the nomination because he enjoys near-record support in his party.