President Trump just withdrew the U.S from the Trans-Pacific Partnership - a major trade pact that Obama spent 5 years negotiating. Here's what you should know:
1. A lot of people on the left also opposed the TPP, saying it would send jobs abroad. Sanders and Trump both campaigned against it.
2. Economists said it would actually boost real incomes. The TPP included labor and environmental protections that are unusual for big trade deals.
3. The TPP would have limited China's economic influence throughout Eastern Asia. many expect China to take a larger role in reshaping the global market.
POTUS also plans to "renegotiate" NAFTA - a free trade pact with Mexico and Canada. Critics say that could lead to an all out trade war.