Ohio Gov. John Kasich said it will be "really difficult" for Donald TrumpDonald John TrumpTrump reversed course on flavored e-cigarette ban over fear of job losses: report Trump to award National Medal of Arts to actor Jon Voight Sondland notified Trump officials of investigation push ahead of Ukraine call: report MORE to win the Buckeye State in November because of his divisiveness. 

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Ohio, a presidential battleground, offers 18 electoral votes, which President Obama narrowly won in 2012 and 2008. 

Both Democrat Hillary ClintonHillary Diane Rodham ClintonImpeachment hearings don't move needle with Senate GOP GOP divided over impeachment trial strategy 'Too Far Left' hashtag trends on Twitter MORE and Trump have campaigned regularly in the state, but Kasich isn't confident Trump can win there. 

"Can Trump win Ohio? He's going to win parts of Ohio where people are really hurting," Kasich said Sunday on CNN's "State of the Union."

"There will be sections he will win because people are angry, frustrated and haven't heard any answers. But I still think it's difficult if you are dividing to be able to win Ohio. I think it's really, really difficult."