“I think there are going to be some tensions within our party,” McCain said during a conference put on by Foreign Policy Initiative, a DC-based think tank. “I worry a lot about the rise of protectionism and isolationism in the Republican Party.”

A prime example, McCain continued, was Kentucky’s next U.S. Senator.

“I admire his victory, but … already he has talked about withdrawals [and] cuts in defense,” McCain said.