Bill Foster is an American politician and member of the Democratic Party. He has served as the U.S. Representative for Illinois's 11th congressional district since 2013. Foster is known for his background in science and business, having earned a Ph.D. in physics and worked in the private sector before entering politics. In Congress, Foster focuses on issues such as science and technology, healthcare, and education. He is a member of several committees, including the Committee on Science, Space, and Technology, where he advocates for policies that promote innovation and research. Foster's work reflects his commitment to using scientific knowledge to inform public policy.