National security adviser H.R. McMaster on Sunday said President Trump has made clear he will resolve the situation in North Korea.

During an interview on "Fox News Sunday," McMaster said North Korea is acting in "open defiance of the international community."

"North Korea poses a grave threat to the United States, our great allies in the region, South Korea and Japan ... but also to China and others. And so it's important, I think, for all of us to confront this regime," he said during the interview.

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"This regime that is pursuing the weaponization of a missile with a nuclear weapon. And so this is something that we know we cannot tolerate ... The president has made clear that he is going to resole this issue one way or another."

McMaster said the Trump administration would prefer to "work with others" and resolve the issue "short of military action."

He said the U.S. needs to work with its partners in the region and globally to enforce the United Nations sanctions and possibly ratchet up those sanctions further. It also involves being prepared for military operations if necessary, he said.

The president said Saturday he would "not be happy" if North Korea conducted another weapons test, adding that his Chinese counterpart President Xi Jinping would likely share that sentiment.