Sen. Sherrod Brown Sherrod Campbell BrownHarris faces pivotal moment with Supreme Court battle Remote work poses state tax challenges Senate Democrats release report alleging Trump admin undermined fair housing policies MORE (D-Ohio) is leading his Republican opponent, Rep. Jim Renacci James (Jim) B. RenacciOhio is suddenly a 2020 battleground Democrats fear Ohio slipping further away in 2020 Medicare for All won't deliver what Democrats promise MORE (R), by a whopping 17-point margin, according to a Baldwin Wallace University poll released Tuesday.

That same poll shows Ohio's Republican attorney general, Mike DeWine, with a much more narrow 41.8-37 percent lead over Democrat Richard Cordray Richard Adams CordrayConsumer bureau revokes payday lending restrictions Supreme Court ruling could unleash new legal challenges to consumer bureau Supreme Court rules consumer bureau director can be fired at will MORE, the former director of the Consumer Financial Protection Bureau (CFPB), in the race to succeed Gov. John Kasich (R).

Brown, a two-term incumbent, is among a handful of Senate Democrats running for reelection this year in a state that 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 won in 2016.

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The survey shows Brown with 49.2 percent support among likely Ohio voters, while Renacci garners 31.8 percent support.

Another 19.1 percent remain undecided, giving Renacci some room to close the gap.

"In both races, the outcomes will hinge on how late-deciding voters break on election day," Tom Sutton, the director of the Community Research Institute at Baldwin Wallace University, said.

Polls have consistently shown DeWine and Cordray, who left his post at the CFPB last year just before announcing his gubernatorial bid, locked in a tight race.

The Baldwin Wallace University survey also showed that a little more than 21 percent of respondents remain undecided on how they would vote in the gubernatorial race.

Republicans entered 2018 with an advantageous electoral map in the Senate. More than two dozen Democratic incumbents in the chamber are defending their seats this year, including 10 in states won by Trump in 2016.

But the party has still found itself with a narrow path to retaining the majority, as states like Tennessee and Arizona are eyed as prime pickup opportunities and Sen. Ted Cruz Rafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE (R) has found himself in an increasingly competitive race against Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D) in deep-red Texas.

The Cook Political Report, an election handicapper, currently rates the Ohio Senate race as "lean Democrat" and the governor's race as a toss-up.

The Baldwin Wallace University poll surveyed 1,048 likely Ohio voters from Sept. 5-15. It has a margin of error of 3.6 percentage points.