As he escalates his war of words with North Korea even further, is Donald Trump trying to pull off a 21st century version of Richard Nixon's Vietnam madman routine?

Or is he just plain crazy?

Donald Trump's threats against North Korea continued Friday - as the President took to Twitter to make another bellicose warning. He said:

"Military solutions are now fully in place,locked and loaded,should North Korea act unwisely. Hopefully Kim Jong Un will find another path!"

The madman routine never worked for Nixon, so what does Trump think he's doing? Former New Hampshire Republican Senator Gordon Humphrey says Trump's threats against North Korea show why he should be removed from office. In a letter sent Wednesday to Congresswoman Ann McLane Kuster, he said:

"Donald Trump has shown repeated contempt for informed and wise counsel. He is sick of mind, impetuous, arrogant, belligerent, and dangerous.

Donald Trump should be relieved of the powers of the Presidency at the earliest date."

Could Trump actually be crazy?