Gov. John Kasich (Ohio) on Sunday voiced disappointment in the volatile protests surrounding GOP presidential front-runner Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE.

“This is not making us proud,” he told host John Dickerson on CBS’s “Face the Nation." "Think of the videos shown all around the world of people slugging each other at campaign rallies.

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“There are people all over the world shaking their heads and saying, ‘What the heck happened to America?'" the Republican White House hopeful added. "We are Americans before we are Republicans and Democrats.”

Kasich criticized Trump for striking a gloomy tone before his supporters and strengthening their frustrations.

“You can walk into a room of 100 people, and you can put them in a really bad mood or you can make them hopeful,” he said. "I talk about how we can fix things. The hopefulness of things, I think, works.”

Kasich said that Trump is addressing the right problems in the wrong way.

“People are worried about their jobs; they’re worried about their wages; they’re putting their money in the bank and they’re not getting interest; their kids are living at home even after college. These are real concerns.”

Trump’s rallies this weekend have been marred by aggressive standoffs between protesters and supporters nationwide.

Multiple arrests have since occurred, with an event in Chicago on Friday evening cancelled for security reasons.