Soumaya Keynes of The Economist and PIIE Senior Fellow Chad P. Bown discuss the economics of trade policy. This week they focus on three big fights in the North American Free Trade Agreement (NAFTA) renegotiations, as President Donald Trump steers the trade relationship between the United States, Mexico, and Canada on Twitter. The first is about the ability of foreign companies to sue governments under NAFTA; the second is Trump seeking to remove constraints on imposing antidumping and countervailing duties on imports from other NAFTA countries, and finally, potential changes to the “rules of origin” that affect how much production takes place in North America.