US national security adviser: Kim Jong Un should not sleep easy at night

U.S. national security adviser Gen. H. R. McMaster warned during an interview with MSNBC on Thursday that North Korean dictator Kim Jong Un should not sleep easy at night, following continued threats from North Korea.

The latest threat came on Thursday, when North Korean state-run media reported that government officials threatened that the U.S. is "on the knife’s edge of life and death.”

During an interview with radio host Hugh Hewitt on MSNBC, McMaster was asked if Kim should be sleeping easy at night.

"No, I think he should not be," McMaster answered. "Because he has the whole world against him, right? He's isolated. He's isolated on this."

North Korea and the U.S. have been engaging in a back and forth of displays of strength. The communist state has been overtly antagonistic, testing Hwasong-14 intercontinental ballistic missiles that Kim has called "gifts" for the "American bastards." The first launch was on July 4 and was said to be able to reach Hawaii or Alaska. Last week, North Korea tested another ICBM, this time with the reported capability of hitting inner American cities, such as Denver or Chicago.

The second missile test put North Korea two years ahead in terms of what experts thought the country's technological capability would be. But it is unknown if North Korea currently has the capability to successfully attach nuclear warheads to their ICBM's.

Despite rising tensions, South Korea's Unification Ministry and the U.S. have been attempting to attain peace between the allies and North Korea. This has been met with silence from North Korea, as well as criticisms from North Korea's state-run media.

McMaster reminded Hewitt that the war with North Korea never officially ended.

“Since 1953, the Korean peninsula has been in a state of armistice," he said. "The war never formally ended. There has been no aggression from the United States, South Korea, any of our allies.”

Hewitt asked McMaster if tensions would ease if Kim Jong Un was removed from power, which McMaster said he wasn't sure about.

“I don’t think anybody has a very clear picture of the inner-workings of that regime," McMaster said. "What is very clear is that it is an authoritarian dictatorship that has existed since the end of WWII. It is now in its third generation, and the difference in this third autocratic ruler is that he’s as brutal as the previous two have been but he’s doing some things differently. He’s killing members of his family."

"The future of that regime, it’s almost impossible to predict,” he continued.

After North Korea's July 4 launch, the U.S. and South Korea conducted a joint test of a precision missile, along with spy footage of Kim Jong Un walking around the Hwasong-14 launch site, smoking cigarettes. The purpose was to prove to Kim that the U.S. knew where he was and could kill him at any time.