In an interview on "Fox News Sunday", CIA Director Mike Pompeo said he would not be surprised if North Korea carried out another missile test to advance its missile and nuclear programs.
"The reaction in North Korea that we are intending to get is an is an understanding that America is no longer going to have the strategic patience that it's had that has permitted him to continue to develop his weapons program", Pompeo said.
"We're not closer to war than a week ago but we are closer to war than we were a decade ago", McMaster said, adding that the Trump administration is prepared to deal militarily with North Korea if necessary.
US President Donald Trump has warned of "fire and fury" and that the US military is "locked and loaded", while North Korea has responsed with threats to target Guam.
Mr Trump said the United States military was "locked and loaded", while Pyongyang has accused him of "driving" the Korean peninsula to the "brink of a nuclear war".
When host Chris Wallace pressed him about how close North Korea is to being able to hit the US mainland, Pompeo said that it was alarming but hard to define.
Pompeo said the rhetoric from Trump was geared at sending a message to North Korea and letting the isolated nation know that the U.S. policy of "strategic patience" had come to an end.
"The United States military is always locked and loaded", he said.
"He's pretty isolated today for the first time", he said.
Pompeo declined to say how long it will be before North Korea could carry out such a nuclear attack on the USA mainland.
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.
Referring to Kim, President Trump added: "If he utters one threat ... or if he does anything with respect to Guam or any place else that's an American territory or an American ally, he will truly regret it, and he will regret it fast".
These comments come following a week of verbal escalation between the United States and North Korea.
North Korea's Minju Joson newspaper said in an editorial Saturday that the North's army is "capable of fighting any war the US wants".
North Korea has been especially provocative in recent months, testing a series of new short-, medium-, intermediate-, and long-range missiles.
In response, Mr Trump said North Korea should expect "big, big trouble" if anything happened to Guam.