Since PPP's last New Hampshire poll in April, Sanders has taken the lead in the state with 42% to 35% for Clinton, 6% for Jim Webb, 4% for Martin O'Malley, 2% for Lincoln Chafee, and 1% for Lawrence Lessig, PPP announced on Tuesday.
According to PPP, 78% see the Vermont Senator favorably to only 12% with a negative opinion, easily making him the most popular candidate on either side with their party's voters. Meanwhile, former Secretary of State Clinton's favorability numbers have slid to 63/25, down from 78/10 in April.
"New Hampshire is somewhat a world unto itself in the Democratic race. We're still finding Clinton well ahead everywhere else. But it's clear there's a real race now in the Granite State," said Dean Debnam, President of PPP.
Republican presidential hopeful Donald Trump is in the strongest position of any PPP poll conducted anywhere since the outspoken businessman entered the race in mid-June.
Trump leads the GOP field with 35% to 11% for John Kasich, 10% for Carly Fiorina, 7% each for Jeb Bush and Scott Walker, 6% for Ben Carson, 4% each for Chris Christie, Ted Cruz, and Marco Rubio, and 3% for Rand Paul.
Trump has a 56/32 favorability rating, which leads other Republican hopefuls, including 47/39 for Ben Carson, 53/35 for Scott Walker, 53/34 for Marco Rubio, and 56/33 for Jeb Bush.
The poll results come at a time when much of Clinton's campaign message is being drowned out by questions about her use of a private email server during her time as Secretary of State.
The email scandal reportedly has Vice President Joe Biden nearing a decision on whether to challenge Clinton for the Democratic nomination, and some key donors are looking at possibly funding Biden.