A stunning new poll has Sen. Bernie SandersBernie SandersSanders, not Trump, is the real working-class hero Big Pharma must address high drug prices Chafee: Negative coverage of Trump ‘tiresome’ MORE (I-Vt.) beating presumptive Democratic presidential front-runner Hillary ClintonHillary Rodham ClintonClinton taunts GOP lawmakers for dodging town halls Instagram taps former Michelle Obama, Clinton aide to lead communications Sanders, not Trump, is the real working-class hero MORE in New Hampshire.

Sanders has eclipsed Clinton by a 44 to 37 percent margin, according to a new Franklin Pierce University/Boston Herald poll that was first reported by the Boston newspaper Tuesday evening.

The previous FPU/Herald poll taken in March had Sanders trailing Clinton 44 to 8.

Today's poll is the first to show Sanders, whose liberal policies are popular with the Democratic base, ahead of Clinton in New Hampshire.

And it comes as reports surfaced that Clinton will turn over her private email server that she used while leading the State Department to Justice Department officials.

Meanwhile, Vice President Joe BidenJoe BidenJill Biden to chair board of Save The Children Ellison holds edge in DNC race survey Top union offers backing for Ellison in DNC race MORE garnered 9 percent, with the other remaining candidates hovering at around 1 percent, according to the poll.

Pollsters telephoned 442 likely Democratic voters in New Hampshire between Aug. 7 and Aug. 10. The poll has a margin of error of plus or minus 4.7 percentage points.

Clinton maintains a dominant lead in other polls. During her failed bid for presidency in 2008, she surged to narrowly win the New Hampshire primary after losing to then-Sen. Barack ObamaBarack ObamaTrump: We will clean up the budget Spicer: Town hall demonstrations include 'professional' protesters President Trump an anti-Semite? Talk about #FakeNews MORE in the Iowa caucuses.