By Jon Keller

BOSTON (CBS) – Vermont Sen. Bernie Sanders holds a six percentage point lead over former Vice President Joe Biden in our exclusive WBZ-TV/Boston Globe/Suffolk University tracking poll of likely New Hampshire Democratic primary voters.

After a two-day sample of 500 likely voters, the survey found Sanders with 24% support, Biden with 18%, Sen. Elizabeth Warren with 13% and former Mayor Pete Buttigieg with 11%. No other candidate comes close to double digits in the tracking poll, which has a margin of error of +/- 4.4 percentage.

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Sanders’ lead is fueled by strong showings among men, where he leads Biden, his closest competitor, 27-17%, and among voters age 18-35, who give Sanders a whopping 47%. Warren is second in that category with 16%.

(WBZ-TV)

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A key category to watch – women, who back Sanders narrowly over Biden, within the margin of error. Surprisingly, Warren runs third among women, lagging a full eight percent behind Sanders.

But the most telling finding of Monday night’s poll is that 40% say they might change their mind before primary day, February 11. “Because the race is so fluid you have the potential for a big momentum run for people who exceed expectations in Iowa,” said David Paleologos, director of the Suffolk University Political Research Center.

Join WBZ Tuesday night at 11pm for the latest results from the WBZ-TV/Boston Globe/Suffolk University tracking poll.

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Jon Keller