President Donald Trump on Friday continued to mock North Korean leader Kim Jong Un, deriding the "little Rocket Man" at a campaign rally in Alabama. "We can't have madmen out there, shooting rockets all over the place," Trump said during a rally supporting Alabama Sen. Luther Strange. "And by the way, the Rocket Man should've been handled a long time ago."Trump's words come as the North Korean leader appears to be engaging in a personal back and forth with the president.