Ohio Gov. John Kasich believes Donald Trump will succeed in winning over a certain segment of Buckeye State voters but may ultimately lose the crucial battleground state in November because he's done too much "dividing."

"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," Kasich told CNN's Jake Tapper in an interview that aired on Sunday.

"I think it's really, really difficult," he repeated.

Trump has visited Ohio, a must-win state for Republicans, twice since the GOP convention took place in Cleveland last month. Voters in Rust Belt states have welcomed the Republican presidential nominee's position on issues like trade, putting Trump and Hillary Clinton in a tight race in Ohio.

The latest RealClearPolitics polling average shows Trump trailing Clinton by less than 1 percent in Ohio, a state with 18 electoral votes that President Obama won in both 2008 and 2012.