Donald Trump is the antithesis of who a commander in chief ought to be. He has shown himself, time and again, to be a belligerent, impulsive bully toward our oldest allies and friends. He insults our friends, including Britain, and praises our adversaries, like Vladimir Putin. He openly admires dictators, actively promotes military adventurism and war crimes, and encourages strong-arm tactics. He has, for some time, exhibited a remarkable resistance to facts about our national security. And his ideas are not only inimical to American values, they are downright dangerous to American national security.