Democrat Phil Bredesen holds a slim lead over Rep. Marsha Blackburn Marsha BlackburnTaylor Swift on National Voter Registration Day: 'We need everyone' Democrats smell blood with new DHS whistleblower complaint Hillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections MORE (R) in Tennessee's Senate race to replace retiring Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R), according to a new poll out Wednesday.

A poll from Mason-Dixon Polling and Strategy reported by The Tennessean finds Bredesen with a 3-point lead over Blackburn, who has represented Tennessee's 7th Congressional District since 2002.

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Forty-six percent of Tennessee voters surveyed said they would back Bredesen if the election were held today, compared to 43 percent who would vote for Blackburn. Eleven percent of voters remain undecided.

Corker easily won reelection in 2012 with 64 percent of the vote. He announced in September that he would not seek another term.

Blackburn has been a top supporter of 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 who has publicly feuded at times with Corker. Trump endorsed Blackburn's bid officially last week.

In a tweet, the president said Blackburn "is a wonderful woman who has always been there when we have needed her. Great on the Military, Border Security and Crime. Loves and works hard for the people of Tennessee. She has my full endorsement and I will be there to campaign with her!"

Bredesen is the former governor of the state, and Democrats hope his popularity can help them steal the seat in a bid to take back control of the Senate in this fall's midterm elections.

The Mason-Dixon poll was conducted from April 17 to 19, largely before Trump's official endorsement, and contacted 625 registered voters in the state. It contains a margin of error of 4 percentage points.