Mariah Lancaster, a Democrat, is a candidate for the U.S. House representing Massachusetts' 6th Congressional District in the upcoming 2026 elections. While not currently a member of Congress, Lancaster has a background as a congressional staffer, having previously served as an American Veterinary Medical Association (AVMA) congressional fellow in the office of U.S. Congresswoman Betty McCollum. In this role, her work focused on the Interior and Environment portfolio, encompassing issues such as animal welfare and wildlife conservation. Follow Mariah Lancaster to get updates on their trades.