“Sorry, but only one thing will work,” Trump wrote in a Saturday tweet after insisting that US authorities have negotiated and signed agreements with Pyongyang in the past quarter of a century to no avail.

"Presidents and their administrations have been talking to North Korea for 25 years, agreements made and massive amounts of money paid hasn't worked, agreements violated before the ink was dry, makings fools of US negotiators," Trump wrote in an earlier tweet.

Trump's latest tweet outburst regarding the North Korea issue raises fears of potential US military action against the nuclear-armed nation, echoing his last Sunday's remarks when he insisted that Secretary of State Rex Tillerson was “wasting his time” attempting to negotiate with Pyongyang.

The hawkish president further stated that his administration would "do what has to be done" in response to actions by North Korean leader Kim Jong-un, whom he has mocked as "Little Rocket Man." 

Trump also threatened to "totally destroy" North Korea in an address before the United Nations annual General Assembly meeting last month, prompting Pyongyang’s Foreign Minister Ri Yong-ho to threaten to test a hydrogen bomb in the Pacific Ocean.

Ri further reacted to Trump’s threat by referring to him as a barking dog, saying, “If he was thinking he could scare us with the sound of a dog barking, that’s really a dog dream.”  

Tensions between Washington and Pyongyang have intensified in recent months, while relations between Trump and Tillerson have also gained fresh interest recently amid contrasting remarks on the US approach to North Korea.

Tillerson held a hastily-scheduled press conference on Wednesday to push back on reports that he considered resigning over the summer. Trump later expressed confidence in his top diplomat.

The development came as Trump criticized Tillerson on Saturday, telling reporters that he sometimes wished his secretary of state would “be a little tougher.”

“We have a very good relationship,” Trump added. “We disagree on a couple of things; sometimes I’d like him to be a little bit tougher… other than that we have a very good relationship.”

Trump’s remarks came after reports that he and Tillerson have a tense relationship. NBC News reported last week that Tillerson called Trump a “moron” and considered leaving the administration.