North Korea responded by claiming it is preparing a plan to fire missiles at the USA territory of Guam in the western Pacific.
"These statements are irresponsible and risky, and also senselessly provide a boon to domestic North Korean propaganda, which has long sought to portray the United States as a threat to their people", the letter read.
They also called on Trump to uphold the Constitution and seek congressional authorization before carrying out any pre-emptive attack on the North.
Gorka told the BBC that, "it is the job of Secretary Mattis, the Secretary of Defense, to talk about the military options, and he has done so unequivocally today", Gorka continued.More news: Transfer Rumour: Manchester City plotting shock move for Barcelona midfielder Sergio Busquets
According to Gorka, Tillerson had no right to say such a thing and instead refused to rule out full-blown war. "He said, 'Woe betide anyone who militarily challenges the United States, ' and that is his portfolio". During brief remarks to reporters on Tuesday, the president threatened nuclear strikes against the regime of Kim Jong-un if it issues threats against the United States, saying the military will retaliate with "fire and fury like the world has never seen".
He added: "I think Americans should sleep well at night, have no concerns about this particular rhetoric of the last few days".
"I think that the President, again, as commander-in-chief, I think he felt it necessary to issue a very strong statement directly to North Korea", Tillerson said. US Vice President Mike Pence has said no such talks are being considered. "He carries a big stick".
ELIZABETH CLAMAN (GUEST HOST): I would be remiss if we didn't bring up what just happened at the secretary of state's spokesperson's meeting before the press.
Q: But are you telling me though, Mr. Gorka, that if there is an action by North Korea that is felt by the United States to be threatening, then that is war?
GORKA: Absolutely, absolutely. No, I never said that, I said for reporters to force our chief diplomat, the awesome Rex Tillerson to give details of military options is nonsensical.