Stephanie Kelton is the bestselling author of "The Deficit Myth" and a leading authority on Modern Monetary Theory, a new approach to economics that has been embraced by leaders like Bernie Sanders and Alexandria Ocasio Cortez. Kelton served as chief economist on the U.S. Senate Budget Committee and was a senior economic adviser to Sanders' presidential campaigns. She was named one of the 50 people most influencing the policy debate in America by POLITICO and is currently a professor at Stony Brook University.