Donald Trump
Donald TrumpReuters

Bernie Sanders and Donald Trump are leading the way in New Hampshire, days before the primaries in that state, polls released Thursday have found.

According to an NBC News poll, Sanders has a significant double-digit lead over Hillary Clinton in New Hampshire.

The poll found that Sanders gets the support of 58 percent of likely Democratic primary voters, while Clinton gets 38 percent. The poll was conducted after Clinton's narrow apparent win in Monday's Iowa caucuses.

The results are essentially unchanged from last week's poll, which showed Sanders ahead by a 57 percent-to-38 percent margin.

Not only does Sanders lead Clinton by 20 points among likely Democratic primary voters in New Hampshire, he also leads her among independents (69 percent to 26 percent), men (70 percent to 25 percent), and those ages 18-29 (76 percent to 24 percent), the poll found.

Meanwhile, Trump is maintaining a wide lead among likely Republican primary voters in New Hampshire, a CNN/WMUR tracking poll found.

Behind Trump's field-leading 29% of support, Florida Senator Marco Rubio climbs to second place with 18%, followed by Iowa winner Ted Cruz (13%) and John Kasich (12%) in a near-tie for third.

Jeb Bush holds fifth place at 10%, behind Cruz and Kasich, with Chris Christie and Carly Fiorina well behind at 4% each.

The poll was conducted entirely after the Iowa caucuses.