Eliza Collins

USA TODAY

It’s another day of good news for Donald Trump in Ohio polling.

On Thursday, a third Buckeye State poll of likely voters — this time from Suffolk University — showed Trump leading Hillary Clinton. His 42%-39% lead is slightly smaller than the two Ohio polls released Wednesday and within the margin of error.

Gary Johnson had 4% in Thursday's Suffolk Poll, and Green Party candidate Jill Stein had 1%.

In Ohio's Senate race, the poll showed incumbent GOP Sen. Rob Portman with an 8-point lead over his Democratic challenger, former governor Ted Strickland, 39%-31%. Nearly one-quarter of voters were still undecided. The polls released Wednesday had Portman with even larger leads.

The poll of 500 likely Ohio voters was conducted Sept. 12-14, and the margin of error is 4.4 points.

Trump has also gotten a boost in Iowa, according to a Monmouth University poll released Thursday.

The Republican nominee was 8 points ahead of Clinton, 45%-37%, among likely voters. In July, he was just 2 points ahead.

Johnson had the support of 8% of likely voters and Stein had 2%; 6% were undecided.

“Iowa is one of the few places where Trump has been able make inroads among voting blocs that generally support Clinton,” said Patrick Murray, director of the independent Monmouth University Polling Institute.

In the Hawkeye State's Senate race, the poll showed Republican Sen. Chuck Grassley with a large lead over his Democratic challenger, former lieutenant governor Patty Judge, 56%-39%.

The telephone poll was conducted Sept. 12-14 of 404 likely Iowa voters, with a margin of error of 4.9 points.