Don YoungDonald Edwin Young (born June 9, 1933) is an American politician and retired educator serving as the U.S. representative for since 1973. He is the Republican Party's longest-serving member of the U.S. House of Representatives and of Congress in history, having represented Alaska for 25 terms.
Young is currently the longest serving member of Congress, as well as the last remaining member who has been in office since the Nixon Administration; he became the 45th dean of the House of Representatives on December 5, 2017, after the resignation of John Conyers from Michigan. He is also the oldest current member of either chamber of Congress. Before the special election following U.S. Representative Nick Begich's death in a plane crash, he was mayor of Fort Yukon from 1964 to 1967 and a member of the Alaska House of Representatives from 1967 to 1971 and the Alaska Senate from 1971 to 1973.
Young is the only member of Congress ever to have served during four of the five presidential impeachment processes, having served during Nixon's, Clinton's, and both the first and second impeachments of Trump. Provided by Wikipedia