Ohio Gov. John Kasich refused to rule out a run for president in 2020 as a Republican primary challenger to President Trump.

When asked by Chuck Todd — host of NBC's "Meet The Press" — if he was going to run in 2020 against Trump, Kasich demurred.

"I don't know what I'm going to do tomorrow," he said. "I will tell you this — the other day, my wife said to me one morning, 'You know, John, I wish you were the president.' That's how I knew the country was in trouble."

Kasich said earlier in the interview he's concerned about Trump's decisions that are leading to the end of the post-World War II global order that saw the United States of America as the world's leader.

He said Trump's administration is undoing many of the bonds that hold that order together and leave space open for authoritarian governments to enter.

"One of the things I am concerned about is the drift that we are in right now in terms of America and the world. Chuck, there is a battle now. The Russians and the Chinese want authoritarian-type government and we are walking away from our allies," he said.

"There is an issue here where we're weakening the things that we put in place after World War II to keep the world safe and reflect our values. We can't afford to walk away, Chuck, because if we walk away, this thing collapses, and who wins? The Russians and the Chinese. Not good for our country and not good for freedom."