Media reports prompt Trump to end plan to brief Musk on secret potential war plans for China

Rachel Maddow follows up on last night's breaking news that the Pentagon planned to brief Donald Trump's top campaign donor, Elon Musk, on top-secret U.S. plans for a potential war with China, with new reports that Trump says he only learned of the plan from the media and ordered that the briefing not take place. Trump's explanation is not especially reassuring as it raises new, unsettling questions.