In Iowa, she holds a 67 percent/27 percent favorable/unfavorable score among Democrats, and just a 32 percent/61 percent score among all registered voters.

By comparison, Biden's numbers among Democrats are 74 percent/17 percent, and among registered voters they sit at 42 percent/44 percent.

In New Hampshire, Clinton holds a 69 percent/27 percent favorable/unfavorable score among Democrats, and 36 percent/60 percent among all registered voters.

In contrast, Biden's numbers among Granite State Democrats are 76 percent/17 percent, and among registered voters they are 46 percent/43 percent.

Bernie Sanders has jumped out to a nine-point lead over front-runner Hillary Clinton in New Hampshire, and he's gained ground on her among Iowa voters in the Democratic presidential race, according to a pair of brand-new NBC News/Marist polls.

In New Hampshire, the Vermont senator gets the support of 41 percent of Democratic voters, Clinton gets 32 percent and Vice President Joe Biden gets 16 percent. No other Democratic candidate receives more than 1 percent.

Back in July's NBC/Marist poll, Clinton was ahead of Sanders in the Granite State by 10 points, 42 percent to 32 percent, with Biden at 12 percent.

Without Biden in the race, Sanders' lead over Clinton in the current survey increases to 11 points, 49 percent to 38 percent.

In Iowa, Clinton maintains her previous advantage over Sanders — but her lead has declined from 24 points in July (49 percent to 25 percent) to 11 points (38 percent to 27 percent); Biden sits at 20 percent. View the full New Hampshire poll here.