Sen. Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE (D-Fla.) is locked in a tight battle for reelection against Florida Gov. Rick Scott (R), according to a poll released Wednesday.

The Quinnipiac University poll of likely voters found both candidates at 49 percent, with Nelson holding a 13 point advantage over his Republican opponent among independent voters -- 56 percent to 43 percent.

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The survey also showed 92 percent support for Scott among GOP voters, compared with 89 percent backing for Nelson among Democrats.

Scott's 51 percent approval rating as governor could be an advantage for him heading into the November midterms, though 46 percent of those polled said they disapprove of his performance in office.

Forty-nine percent of survey respondents said they approve of Nelson's job performance, putting him 5 points above Sen. Marco Rubio Marco Antonio RubioOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats step up hardball tactics as Supreme Court fight heats up Press: Notorious RBG vs Notorious GOP MORE (R-Fla.), who is not up for reelection this year.

Nelson's seat is seen as a potential pickup for Republicans in their effort to retain or even expand their majority in the Senate. Democrats, meanwhile, need to defend several Senate seats in states, like Florida, where President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE won in 2016.

The Quinnipiac poll surveyed 785 likely voters in Florida from Aug. 30 through Sept. 3 and has a margin of error of 4.3 percentage points.