John Dingell is a former member of the U.S. House of Representatives, serving from1955 until 2015. He represented Michigan throughout his tenure and most recently served as the representative for Michigan’s 12th congressional district.rnrnHe began his congressional career representing Michigan’s 16th district by succeeding his father, John Dingell Sr. Having served for more than 59 years, he has the longest congressional tenure in U.S. history. He is also the longest-serving dean of the U.S. House of Representatives and dean of the Michigan congressional delegation.rnrnWhile in Congress, Dingell served on the House Energy and Commerce Committee and chaired the committee for multiple terms. He was awarded the Presidential Medal of Freedom in 2014.