Even by President Donald Trump’s standards of aggressive bombast and hyperbole, his speech to the United Nations on Tuesday was a stunner. He overtly threatened to wipe out North Korea, a country of 25 million people. Trump and North Korean President Kim Jong Un have been trash-talking for some time now about North Korea’s aggressive pursuit of nuclear weapons and ballistic missiles. But Trump raised the ante in his U.N. speech when he said that the “Rocket Man is on a suicide mission for himself.” Just prior to that statement Trump said, “The United States has great strength and patience,...