Rep. Keith Ellison (D-Minn.) speaks in Phoenix in January.
"I think that the president unfortunately has elevated [North Korean Supreme Leader] Kim Jong-Un now", McCaskill told the crowd, according to the Daily Journal Online.
"You have this guy making bellicose threats against somebody else who has very little to lose over there", he said, referring to Trump.
There were murmurs of agreement in the room before Ellison described what would need to happen before a "missile launch" become a reality.
GETTYNorth Korea has carried out a series of missile tests
The higher close by treasuries came as the ever-escalating war of words between President Donald Trump and North Korea continued to raise geopolitical concerns. "If you don't want to be a deer in the headlights, start calling for diplomacy immediately".
However, immediately follow his speech at the Netroots Nation conference, Ellison dialed back his remarks.
On Tuesday, Trump said North Korea "will be met with fire and fury like the world has never seen" if it continues to threaten the United States, after North Korea warned it will teach the U.S. a "severe lesson" with its nuclear weapons if Washington would dare to opt for military action against Pyongyang.
"I know people say the rhetoric wasn't stopping the advancement of their weapons, but we're tracking it and we have the technology to intercept", McCaskill said Friday. "What we need is someone bringing calm to the situation, not spiking it".
Ellison's comment about Trump and Kim drew quick fire from the Republican National Committee.
Lake Mead Recreational Area holding solar eclipse viewing party
Homemade filters and ordinary sunglasses don't provide enough protection for looking at the sun or the eclipse. Outside of the path of totality, always use solar filters.