Forty-seven percent of likely voters in New Hampshire surveyed said they supported Hillary Clinton, compared with 39 percent who said they prefer Donald Trump in a two-way contest. | Getty Clinton tied with Trump in Nevada, trouncing him in New Hampshire

Hillary Clinton is tied with Donald Trump in Nevada but leads by 8 points in New Hampshire, according to NBC News-Wall Street Journal polls conducted after the third presidential debate.

Forty-seven percent of likely voters in New Hampshire surveyed said they supported Clinton, compared with 39 percent who said they prefer Trump in a two-way contest. In a four-way race, Clinton's lead expands to 9 points, leading 45 percent to Trump's 36. Ten percent preferred Libertarian Gary Johnson and 4 percent said they support the Green Party’s Jill Stein in the poll, which was conducted Oct. 20-24.

In Nevada, the race was a tie, with both Clinton and Trump picking up 45 percent of likely voters’ support in a two-way race. In a three-way contest, Johnson came in at 10 percent, and Clinton and Trump remained tied at 43 percent each. The Nevada poll was also conducted Oct. 20-24.

The polls also asked voters about the competitive Senate races in the two key swing states.

The Nevada survey found that Republican Joe Heck has a lead over Democrat Catherine Cortez Masto; he polled at 49 percent among likely voters to her 42 percent.

In New Hampshire, the incumbent, Republican Sen. Kelly Ayotte, has a slim lead over Gov. Maggie Hassan, her Democratic challenger. Forty-nine percent of likely voters surveyed said they support Ayotte and 48 percent indicated support for Hassan.

The New Hampshire survey’s sample included 1,138 adults, of which 768 are considered likely voters. That subset has a margin of error is plus or minus 3.5 percent. In Nevada, the sample size was 1,222 adults, including 707 likely voters, with a margin of error of plus or minus 3.7 percentage points.