"These statements are irresponsible and unsafe, 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", read the letter which was spearheaded by Rep. John Conyers of Missouri.
North Korea and its totalitarian leader, Kim Jong Un, have again been thrust into the center of global media attention this week after its government threatened to fire missiles at a United States pacific territory.
President Trump launched his fiercest warning to the rogue state last week, warning it faces "fire and fury like the world has never seen" if it continues to threaten the U.S. with missiles. On Thursday, Trump said his original statement "wasn't tough enough".
Recent missile tests have put worldwide attention on North Korea, a country vying to be the world's next nuclear power.
They further warned that Trump would be held responsible by Congress and the American people if a "careless and ill-advised miscalculation results in conflict that endangers our service members and regional allies".
"It's somewhat reminiscent to me of the history of World War I and how the world kind of blundered into that", Clapper said in an interview with CNN. I mean, his rhetoric might make Kim Jong-un think that he needs to strike first.
According to The Washington Post, Mattis told a pool of reporters Wednesday that "of course there's a military option" in place to address North Korea, but "we want to use diplomacy".
After the telephones talks on Saturday, the White House said in a statement that the two leaders discussed the increasingly unsafe situation associated with North Korea's destabilizing and escalatory behavior.
Mr Rudd, who just returned to the USA from a trip to China, said "the Chinese baseline conclusion" is Mr Trump's threat of unilateral military action against North Korea was just "one huge bluff".
President Trump over the past week has intensified his rhetoric against North Korea.
State-run China Central Television quoted Xi as telling Trump the "relevant parties must maintain restraint and avoid words and deeds that would exacerbate the tension on the Korean Peninsula". 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.