North Korea's foreign ministry on Saturday aimed a barrage of insults and accusations at Trump, who has tried to drum up support for increased sanctions against the rogue state on his 12 day tour of Asia.
"Reckless remarks by an old lunatic like Trump will never scare us or stop our advance", the North's Foreign Ministry said in a statement.
It comes on the same day Rodong Sinmun, the regime-run newspaper, warned the North would "surely win in the showdown" with the US and South Korea. "I don't know if it will but it would be very, very nice", he added.
Kim's regime has continued to carry out nuclear and ballistic missile tests despite widespread global condemnation and a series of crippling sanctions aimed at strangling the state's cash sources.
President Donald Trump on Sunday ridiculed North Korean dictator Kim Jong Un as "short and fat", and he lashed out at critics of his relationship with Russia's leader, saying they are "haters and fools" who don't understand the merits of a good relationship with Moscow.
Shortly after that speech, North Korean officials told CNN, "We don't care about what that mad dog may utter", referring to Trump.
Asked if he could see himself being friends with Kim, Trump said: "That might be a odd thing to happen but it's a possibility".
It's a continuation in the ongoing war of words, even as the regime's missile test have noticeably paused - a surprising development given that North Korea has often followed these verbal spars with threats and missile tests.
The documents suggested that North Korean dictator Kim Jong-un could fire nukes at the USA and its allies.
Trump has traded insults and threats with Kim in the past amid escalating tensions over Pyongyang's nuclear and missile programs.
Addressing a press conference later, Trump declared his belief that it was possible for the two leaders to be "friends".
"The 28,500 US Armed Forces personnel in South Korea are vastly outnumbered by North Korean forces, as well as ROK (South Korean) forces that will conduct the overwhelming majority of the fighting", he wrote.
That test would be the 15th ballistic missile test since Trump took office, and the first since September.
We'll see what happens now.
Lieutenant General Jan-Marc Jouas said the United States could be swarmed by North Korean troops in a number of shocking documents leaked to Congress.