For years, Donald Trump has used Twitter to lie, harass and spread hateful messages.

But now that he is President, his Twitter account is a national security threat—as "House of Cards" creator Beau Willimon recently argued.

President Trump regularly uses Twitter to bypass diplomatic channels and broadcast to the world his dangerous and impulsive conduct. If allowed to continue, it could start a war.

The President can say what he wants and in whatever channel he chooses to speak, but no private media corporation is required to give him an outlet.

Twitter recently suspended the account of white supremacist David Duke, so there is no reason why they can't do the same to Donald Trump.