Senator Bernie Sanders has opened a nine-point lead over fellow Democrat Hillary Clinton among party supporters in New Hampshire, according to an NBC News/Marist Poll released on Sunday.
The survey showed that 41% of Democratic voters would back Sanders while 32% would cast a vote for Clinton if the poll were held today – and Vice-President Joe Biden were on the ballot.
Support for Biden, who has yet to decide whether to run after the death of his son Beau in May, was at 16%.
Draft Biden, a group urging him to put his name forward, said the poll showed “a deep desire among Democratic primary voters to have Vice-President Biden join the presidential race”.
In July, in the same poll, Sanders had 32% support while Clinton had 42%.
Sanders, from next-door Vermont, has appealed to young and working-class voters as he challenges the former first lady, New York senator and US secretary of state, who is the frontrunner for the Democratic nomination.
New Hampshire is due to hold its presidential primaries in January and many campaigns are courting voters in the small New England state.