President Trump urged Chinese President Xi Jinping to solve the problem of an aggressive North Korea, or "we will solve the problem without them!"

"I explained to the President of China that a trade deal with the U.S. will be far better for them if they solve the North Korean problem!" Trump tweeted Tuesday morning.

"North Korea is looking for trouble. If China decides to help, that would be great. If not, we will solve the problem without them! U.S.A.," he followed up.

Trump and Xi met last week at his Florida Mar-a-Lago resort and appeared to feel very positive afterward in comments over the weekend. Trump said he and Xi had a great personal relationship but time would tell on how the trade relationship between the two countries would develop.