As congressman to Michigan's First Congressional District for 18 years, Bart developed a deep understanding of issues that directly affected his constituents.
Bart served on the U.S. House of Representatives Energy and Commerce Committee. He was involved with several related subcommittees, including the Health, Energy and the Environment, Communications, Technology and the Internet, Consumer Protection, and Commerce and Trade Subcommittees. He chaired the Oversight and Investigations Subcommittee, and oversaw investigations into physical and cybersecurity breaches at U.S. nuclear labs, food and drug safety matters, and insurance company policy rescissions. He played a critical role in the passage of the Patient Protection and Affordable Care Act (ACA) of 2010. He also served on the Armed Services, Government Reform, and Merchant Marine and Fisheries Committees.
Bart began his career in public service as a police officer in Escanaba, Michigan. He continued his career in law enforcement as a Michigan State police trooper, until he was medically retired because of an injury sustained in the line of duty. He also served in the Michigan House of Representatives.