Republican presidential hopeful John Kasich in an interview broadcast early Sunday ramped up his criticism of President Obama’s trip to a baseball game in Cuba hours after the “slaughter” in “the heart of Europe.”

“If I were president, I'm just telling you what I would do. I wouldn't have gone to a baseball game in Cuba,” Kasich said on NBC’s “Meet the Press.” “I would have come home.

“I would have called all the world leaders. I would have gathered my intelligence and military experts. And I would have sent them to Europe to sit down, to assess our vulnerabilities,” the Ohio governor said.

“I mean, I'm not overreacting here. But you also can't underreact,” he added.

Kasich also slammed GOP front-runner Donald TrumpDonald John TrumpFamily immigration detention centers could be at capacity within days: report Trump likely to meet with Putin in July: report DOJ requests military lawyers to help prosecute immigration crimes: report MORE for a call to ban Muslims from entering the U.S.

“When somebody says we ought to ban all Muslims from coming in, that is a statement that [is] not based in reality. I don't even know how you would do it. “

Kasich said such a ban would also serve to aggravate “the very people whose cooperation we need.”