Keynes and Bown examine the legal arguments surrounding President Trump’s threats to withdraw from the North American Free Trade Agreement and World Trade Organization. They speak with legal experts Gary Hufbauer (PIIE), Rachel Brewster (Duke Law School), and Joel Trachtman (Fletcher School of Law and Diplomacy) about what constitutional arguments and legal precedent might—and might not—constrain a president from taking such an action without the approval of Congress.