Hillary Clinton is losing her edge over Donald Trump in Wisconsin, according to a new Monmouth University poll of likely voters in the Midwestern battleground state.

The former secretary of state leads Trump 43 percent to 38 percent in the Badger State, while 7 percent of voters plan to back Libertarian nominee Gary Johnson and 8 percent remain undecided. A Marquette University poll released earlier this month showed Clinton holding a 15-point lead.

Thirty-seven percent of independents in Wisconsin currently back Trump, while 34 percent plan to cast their ballot for his Democratic opponent and 10 percent support Johnson.

Trump's play for working-class voters in the Rust Belt appears to be paying off. The Republican presidential hopeful leads Clinton by a slim 2-point margin among white voters and is outperforming Mitt Romney among white men by 8 percentage points.

Clinton continues to enjoy a significant advantage among minority voters, leading Trump by 55 percentage points among African-Americans, Hispanics and Asians. While Trump has been working direct appeals to black voters into his stump speeches lately, only a third of Wisconsin voters said he would do a better job than Clinton at handling race relations as president.

Democratic candidate Russ Feingold holds a 13-point lead over incumbent Republican Sen. Ron Johnson (54 percent to 41 percent) in the Wisconsin Senate race, while just 3 percent of voters remain undecided. Johnson enjoys a net-positive job approval rating, but a far greater percentage of Wisconsinites have a positive view of his opponent (46 percent) than him (34 percent).

Ninety-two percent of Clinton supporters plan to back Feingold in the Senate election, while 84 percent of pro-Trump Republicans intends to vote for Johnson.

The Monmouth University poll of 404 likely voters in Wisconsin was conducted Aug. 27-30. Results contain a margin of error plus or minus 4.9 percentage points.