"He is unsafe", Humphrey said in the letter. Ben Cardin, the Foreign affairs committee's top Democrat, compared Trump's comments to those issued by North Korea itself.
He defended President Donald Trump against criticism of using overly aggressive rhetoric. "And you know what else we've seen?"
"The Department of State strongly warns USA citizens not to travel to North Korea/the Democratic People's Republic of Korea (DPRK)", the release stated.
The US Department of State on Thursday issued an updated travel warning for North Korea to include information about the impending tourist ban.
"North Korea poses a serious threat to the US and all options should be on the table to protect the American people", Nelson said.More news: Gal Gadot bursts into song to celebrate Wonder Woman box office milestone
"Today, the president tweeted that he had ordered a modernization of the US nuclear arsenal and touted its unmatched power".
Gordon Humphrey (N.H.), a longtime critic of President Trump, said on Wednesday the commander in chief is "sick of mind" and urged New Hampshire's lawmakers to support calls to remove him from office.
They requested details on steps that the administration is taking to promote the prospects for direct talks that could "lower the potential for catastrophic war and ultimately lead to the denuclearization of the peninsula". "Even if Donald Trump was the most diplomatic person in the world, he would be still be building a weapon and he would still be developing his missiles".
That letter also asked about steps to address humanitarian issues such as the reunification of Korean families separated by the armistice that concluded the Korean War, and the return of remains of US service members left in North Korea after the war.