Democrats hold a 7-point lead over Republicans in the midterms, according to a new survey released just weeks ahead of the congressional elections.

Forty-nine percent of likely voters surveyed told Fox News pollsters that they would vote for the Democratic candidate in their district, while only 42 percent said they would back the Republican.

Democrats have a 6-point edge, 46 to 40 percent, among registered voters, pollsters found.

"Usually we see Republicans do better when we go from registered voters to likely voters," said Democratic pollster Chris Anderson.

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Democrats have a 17-point lead in counties that were close in 2016, according to the poll, just 2 points lower than their 19-point advantage in counties Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE carried.

Fox pointed to health-care policy for the Democrats' edge.

More registered voters — 49 percent to 34 percent — said they believe Democrats handle health care better than the GOP.

Pollsters also found that fewer Americans oppose ObamaCare or even greater government intervention into health care than in September 2014, though a small plurality of Americans still believe ObamaCare went too far.

President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE also may be a factor, pollsters noted. Twenty-six percent of voters in the new survey said they would be more likely to support a candidate Trump campaigns for, while 43 percent said they would be less likely to do so.

Fox News pollsters conducted phone interviews with 1,003 registered voters from Sept. 16 to 19. The pool of likely voters numbered 818. The margin of error for both groups is 3 percentage points.