Presidents both well known and rarely considered have had a major influence on American life today. How did what happened during Jimmy Carter, Warren G. Harding, FDR, and Ronald Reagan's presidencies affect what you drive and buy, as well as how you think about taxes? Former tech CEO Ron Gruner talked with Inside Sources about his new book, "We The Presidents: How American Presidents Shaped the Last Century", profiling all the men who've served from 1921-2020.