President Donald Trump took to Twitter on Saturday to double down on recent ominous remarks about North Korean leader Kim Jong Un.

"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 U.S. negotiators. Sorry, but only one thing will work!" Trump wrote.

Trump's tweets follow a tense few weeks between the United States and North Korea. On the floor of the United Nations, Trump and the North Korean foreign minister traded accusations and threatsOn Oct. 1, Trump tweeted that Secretary of State Rex Tillerson should save his "energy, we'll do what has to be done."

Last week, Trump had dinner with military leaders and their spouses. Before the event, he called in the press corps and directed them to take a picture of the group. Surrounded by his military top-brass, the president remarked, “You know what this represents? It could be the calm before the storm.” However, he hasn’t remarked what “the storm” he alluded to might be, and some suspect he was just playing up the cameras.

>> Watch the moment here

The United States and North Korea have also been flexing their military muscles at each other over the past few months. Kim's regime has launched multiple missiles, setting the nations around him like Japan and South Korea on edge. In response, the United States has flown bombers right up to the border and run military exercises with the South Koreans.

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