American politician who served as the 47th speaker of the United States House of Representatives from 1977 to 1987 and represented northern Boston, Massachusetts, as a Democrat from 1953 to 1987. The only Speaker to serve for five complete consecutive Congresses, he is the third longest-serving Speaker in American history after Sam Rayburn and Henry Clay in terms of total tenure and longest-serving in terms of continuous tenure (Rayburn and Clay served multiple terms in the Speakership).