Game Change author John Heilemann blasts Trump over his 'demented and deranged' nuclear button tweet

Speaking on Morning Joe on Wednesday, Game Change author John Heilemann did not hold back in his blistering criticism of President Trump's tweet that taunted North Korea over the unimpressive size of its nuclear button. Trump "is not merely being cavalier with a threat about nuclear war," said Heilemann. "He's being cavalier in a way that makes him seem demented and deranged." Heilemann had also pointed out that neither Republican nor Democratic presidents in the past have ever before treated th...