John David Dingell Jr. (July 8, 1926 – February 7, 2019) was an American politician who served as a member of the United States House of Representatives from 1955 until 2015. A member of the Democratic Party, he holds the record for longest-ever serving member of Congress in American history, representing Michigan for more than 59 years. He most recently served as the representative for Michigan's 12th congressional district. A longtime member of the House Energy and Commerce Committee, Dingell was the chairman of the committee from 1981 to 1995 and 2007 to 2009.
Dingell began his congressional career by succeeding his father, John Dingell Sr., as representative for Michigan's 16th congressional district on December 13, 1955; his father had held the seat for 22 years. He left office on January 3, 2015. Having served for over 59 years, he has the longest congressional tenure in U.S. history. He was also the longest-serving Dean of the U.S. House of Representatives and Dean of the Michigan congressional delegation. Dingell was one of the final two World War II veterans to have served in Congress; the other was Texas Representative Ralph Hall, who also left Congress in 2015. During his time in Congress in addition to protecting the automobile industry important to his district, Dingell was instrumental in passage of the Medicare Act, the Water Quality Act of 1965, Clean Water Act of 1972, the Endangered Species Act of 1973, the Clean Air Act of 1990, and the Affordable Care Act, among others. He was most proud of his work on the Civil Rights Act of 1964.
Dingell announced on February 24, 2014, that he would not seek reelection to a 31st term in Congress. His wife, Debbie Dingell, ran to succeed her husband and defeated Republican Terry Bowman in the general election on November 4, 2014. He was the last member of Congress who had served in the 1950s and during the presidencies of Dwight D. Eisenhower and John F. Kennedy. President Barack Obama awarded him the Presidential Medal of Freedom in 2014.