"Hopefully Kim Jong-un will find another path!" he tweeted.
"I want to thank him because we're trying to cut down our payroll and as far as I'm concerned I'm very thankful that he let go of a large number of people because now we have a smaller payroll", he said.
"This isn't anything new", the official added.
Pyongyang's state-run KCNA news agency said on Thursday its army would complete plans in mid-August to fire four intermediate-range missiles over Japan to land near Guam as North Korea and the United States engaged in increasingly heated rhetoric this week over the North's nuclear weapons programme.
Asked about Russian president Vladimir Putin expelling U.S. diplomats from Russia, the president portrayed as it as a positive thing for taxpayers.
While the rhetoric between the two leaders continue to escalate, South Korean Christians are going on the spiritual offensive, deploying prayers and scriptures.
Other members of Trump's administration have attempted to offer different views on the North Korea.
"It's a 14-minute flight time if all the factors are successful and if it gets through all the US defense layers in place", Charfauros told CNN.
In Moscow, Russian Foreign Minister Sergei Lavrov urged Pyongyang and Washington to sign up to a previously unveiled joint Russian-Chinese plan under which North Korea would freeze missile tests and the United States and South Korea would impose a moratorium on large-scale military exercises.
US financial markets took the rhetorical escalation in stride on Friday even as European and Asian markets weakened in a catch-up reaction to Thursday's drop.
"How do people really see Guam in the context of the U.S. family?"
As Johns Hopkins University's 38 North website noted on Thursday, North Korea did actually appear to suggest last month that it was open to getting rid of its nukes and rockets "if the U.S. hostile policy and nuclear threat to [North Korea] are definitely terminated".
"You'll see, you'll see".
Trump said the United States loses a lot of money on trade with China. "I don't have any problem with that".
That's still only a fraction of the 8 million Chinese who visited South Korea in 2016.
"This is tragicomedy of its own making".
He further added that the United States hopes that "at some point", North Korea will understand and sit down for a dialogue.
Tom Karako, director of the Missile Defense Project at CSIS, said Trump's budget request for missile defense was likely because the process was "a little on autopilot" during the transition, as the funding was effectively an extension of the Obama administration's budget.
"If you can recall and just going back to 2013, this is about the third, fourth threat made by North Korea specifically to Guam as well as other facilities or bases in Asia and in the States, Hawaii and the West coast".
"To do that early in the morning, whether or not it was appropriate you'd have to ask them".
There has been no indication that any actual attack on the Pacific island is imminent.
"In off-the-cuff remarks on Tuesday, Trump said: "(Kim) has been very threatening beyond a normal state", Trump said. "They will be met with fire, fury and frankly power the likes of which this world has never seen before". It's not in either country's interests to spark a conflict that would see the North Korean regime wiped out alongside untold casualties for America's allies.
Trump's threat of military intervention in Venezuela also seems to contradict the advice of his top national security adviser. "Our readiness, we are ready". But that will require cooperation from China, which the Trump administration has gone to great lengths to alienate.
"I think China can do a lot more, yes", Trump said. The official was not authorized to discuss the matter publicly so spoke on condition of anonymity. China is the North's biggest economic partner and source of aid, but says it alone can't compel Pyongyang to end its nuclear and missile programs.