President Trump sent his third warning in a week to the North Korean regime on Friday, promising leader Kim Jong Un that he will "truly regret" the consequences if he overtly threatens the United States one more time.

"If he utters one threat in the form of an overt threat ... or if he does anything with respect to Guam or any place else that's an American territory or an American ally, he will truly regret it and he will regret it fast," the president told reporters at his golf club in Bedminster, N.J.

Trump said earlier this week the U.S. will release "fire and fury" on North Korea if the country continues to escalate its threats. He echoed that sentiment on Friday, saying he hopes their leaders "fully understand the gravity of what I said."

"Those words are very, very easy to understand," Trump told reporters.

Dismissing a question about backchannel diplomatic processes, Trump said he would prefer to talk about "a country that has misbehaved for many, many years -- decades actually -- [and] through numerous administrations."

The president criticized his predecessors for failing to deal with the issue, leaving him with "no choice but to take it on."

"We have tens of millions of people in this country that are so happy with what I am saying because they're saying, 'Finally, we have a president that's sticking up for our nation and frankly, sticking up for our friends and allies,'" Trump said.

While administration officials continue to weigh their options, Trump said in a tweet Friday morning that "military solutions are now fully in place ... should North Korea act unwisely."