Joe Lieberman was a former United States senator and attorney general of Connecticut. During his twenty-four years in the Senate, Lieberman was known for working across party lines and played a significant role in shaping legislation in various fields, including national security, foreign policy, environmental protection, and healthcare. He chaired the Committee on Homeland Security and Government Affairs and led high-profile investigations. Lieberman was the Democratic vice president nominee in the 2000 presidential election. An independent Democrat, he served as national chair of No Labels, chair of United Against Nuclear Iran, and on several boards, including the McCain Institute for International Leadership and the American Federation for Children.