Trump at war

In this episode, The Washington Post's Libby Casey, Rhonda Colvin and James Hohmann decode President Trump's efforts to redefine America's role on the world stage – from seemingly starting trade wars with China, Mexico and Canada to straining alliances with Europe that have defined American foreign policy since the Second World War.Plus, what is Trump really trying to accomplish – and is he playing chess, with a longer strategy in mind, or just checkers?