MSNBC analyst John Heilemann said Wednesday on "Morning Joe" that President Donald Trump's tweet the prior day taunting the size of North Korean leader Kim Jong Un's "nuclear button" makes him seem "demented and deranged."
After Kim said that he has a "nuclear button" on his desk, Trump wrote on Twitter on Tuesday that his is "bigger and more powerful."
"North Korean Leader Kim Jong Un just stated that the ‘Nuclear Button is on his desk at all times.' Will someone from his depleted and food starved regime please inform him that I too have a Nuclear Button, but it is a much bigger & more powerful one than his, and my Button works!" Trump wrote.
Heilemann castigated the tweet on Wednesday morning.
"For all of our lifetimes, any president of any party who treated threats of nuclear war in any way in a cavalier way—we have not seen that really from Republicans or Democrats," Heilemann said.
He added that anybody who treats such a national security issue cavalierly would normally be condemned by serious people in both political parties.
"He is not merely being cavalier with a threat about nuclear war," Heilemann said. "He is being cavalier in a way that makes him seems demented and deranged and makes no serious—of our serious allies or adversaries around the world think that he is a serious person talking in this way about the most serious threat that the world ever faces."