Harshbarger served as Massachusetts Attorney General from 1991 to 1999. He prosecuted white-collar crime, insurance fraud, enforced child labor laws and led the passage of unprecedented brownfields legislation, helping spur economic development in formerly depressed neighborhoods. He was the first Attorney General in the nation to work with the health care community and develop hospital and HMO community benefit guidelines and led Massachusetts' effort to be one of the first five states in the country to sue tobacco manufacturers for the costs of health care associated with tobacco use. He also worked on the “Safe Neighborhood Initiative”, a ground-breaking partnership against urban crime and violence and worked to combat domestic violence. Prior to his role as Attorney General, Harshbarger served as the District Attorney of Middlesex County from 1983 to 1991. Harshbarger also has served as counsel to the State Ethics Commission, Chief of the Public Protection Bureau in the Attorney General's Office, deputy chief counsel for the Massachusetts Defenders Committee and Chairman of the Governor’s Commission on Correction Reform. He was also the Democratic Party's Nominee for Governor in 1998. He previously was the President and CEO of the national group Common Cause in Washington, D.C. for three years and currently is senior counsel at Proskauer Rose LLP.