In a major speech addressing his administration’s national security strategy, the President said Kim Jong-un’s nuclear-armed regime cannot be allowed to “threaten the world”.
He said recent sanctions had been successful in isolating the hermit state, but warned there was “much more work to do”.
Mr Trump also blamed previous administrations for not “taking care of” the situation.
Speaking at the Ronald Reagan Building and International Trade Center in Washington, DC, he said: “This situation should have been taken care of long before I got into office when it was much easier to handle.
“But it will be taken care of. We have no choice.
“Our campaign of maximum pressure on the North Korean regime has resulted in the toughest ever sanctions.
“We have united our allies in an unprecedented effort to isolate North Korea however there is much more work to do.
“America and its allies will take all necessary steps to achieve a denuclearisation and ensure that this regime cannot threaten the world.”
More to follow.