U.S. Trade Representative Robert Lighthizer (from left), U.S. Treasury Secretary Steven Mnuchin and Chinese Vice Premier Liu He gather for a meeting in Beijing on May 1. They are meeting again in Shanghai this week.
Andy Wong/AFP/Getty Images
Rep. Alexandria Ocasio-Cortez speaks about the Green New Deal in Washington, D.C., on May 13. She has shined a spotlight on a once-obscure brand of economics known as "modern monetary theory."
Federal Reserve Chairman Jerome Powell speaks during a news conference on May 1 in Washington, D.C. He is testifying before Congress this week about economic challenges.
Mark Wilson/Getty Images