Hillary Clinton also leads Donald Trump 44 percent to 40.8 percent in the POLITICO Battleground States Polling Average for Ohio. | Getty Poll: Clinton leads Trump by 4 in Ohio

Hillary Clinton narrowly leads Donald Trump by 4 points among likely voters in Ohio, according to the results of a Monmouth University poll out Monday.

Slightly more than 4 in 10 of those surveyed — 43 percent — said they will vote for the Democratic nominee in November, while 39 percent said they will support Trump. Libertarian Gary Johnson, who will appear on the state’s ballot as an independent, earned 10 percent, while less than 1 percent chose the Green Party’s Jill Stein, and another 8 percent were undecided among those options.

The results are in line with other post-convention polls showing Clinton with a slight edge in the bellwether state, which has voted for the eventual presidential winner in every election since 1964.

Clinton leads Trump 44 percent to 40.8 percent in the POLITICO Battleground States Polling Average for Ohio.

Clinton is underperforming President Barack Obama with black, Hispanic and Asian voters, grabbing 72 percent to Trump’s 10 percent, compared with the 84 percent who supported Obama over Mitt Romney’s 14 percent in 2012. But among white voters, where Trump leads Clinton 45 percent to 37 percent, the Republican nominee is similarly underperforming Romney, who topped Obama 57 percent to 41 percent.

Trump’s performance among white men also doesn’t quite measure up to Romney's. The 2012 GOP nominee won with 62 percent to Obama’s 36 percent. Trump, meanwhile, leads Clinton 52 percent to 28 percent. And in the case of white women, Trump is lagging even farther behind Romney. In 2012, Romney won that demographic group 53 percent to 46 percent, while Clinton currently leads 46 percent to 38 percent.

Perhaps things might have gone differently for the Republican Party in Ohio had home-state Gov. John Kasich won the nomination.

Kasich, who avoided the Republican National Convention in Cleveland last month and has shied from supporting Trump, appears to have earned some respect for doing so.

Forty percent of likely voters said they think more highly of Kasich because he is not supporting Trump, while 17 percent said they think less of him. Another 44 percent said it made no difference in their opinion of him.

Monmouth conducted the poll via landlines and cellphones from Aug. 18-21, surveying a random sample of 402 likely voters in the state. The margin of error is plus or minus 4.9 percentage points.