Ohio Gov. John Kasich has a grave warning for the GOP.

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"If the Republican Party does not evolve, the Republican Party is going to die," Kasich said in an interview with Business Insider published Saturday.

"The Republican Party cannot be anti-trade, anti-immigrant, not out there practicing the politics of people, you know, the issues surrounding drug addiction and mental illness and the cost of prescription drugs and healthcare and student debt and all of these things are very personal to people now."

"So I do believe that the party needs to evolve, or I won't be a part of it," he said.

Kasich has been a critic of Republican presidential nominee Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE, whom he clashed with during the GOP primary.

Last week, Kasich chastised Republicans who have not yet condemned Trump's lewd comments and urged them to "lead by example."

"I don't have any more words," he said.

"I've tried to do the best I can to lead by my actions in an appropriate way without recrimination or anything like that, because I ... I'm a very happy person. I don't think I need to say any more than what I've demonstrated.”

The comments came after the release of a 2005 tape in which Trump talks about how he can grope and kiss women without their consent because of his celebrity status.