On June 4, 2010, State Representative
Eddie Washington died of a
heart attack. On July 6, 2010, Mayfield was appointed by local Democratic leaders to succeed Washington to serve in the
Illinois House of Representatives from the 60th district. The 60th district, at the time, included all or parts of
Waukegan and
North Chicago. During the 2011 decennial redistricting process, portions of
Gurnee,
Beach Park, and
Park City were added to the 60th district. As of July 3, 2022, Representative Mayfield is a member of the following Illinois House committees: • Appropriations - Elementary & Secondary Education Committee (HAPE) • Appropriations - Human Services Committee (HAPH) • (Chairwoman of) Appropriations - Public Safety Committee (HAPP) • Consumer Protection Committee (HCON) • Elementary & Secondary Education: School Curriculum & Policies Committee (HELM) • Energy & Environment Committee (HENG) • Firefighters and First Responders Subcommittee (SHPF-FIRE) • Insurance Committee (HINS) • Law Enforcement Subcommittee (SHPF-LAWE) • Police & Fire Committee (SHPF) • (Chairwoman of) Product Safety Subcommittee (HCON-PROD) • Small Business, Tech Innovation, and Entrepreneurship Committee (SBTE) • (Co-chairwoman of) Special Issues (INS) Subcommittee (HINS-SPIS) ==Electoral history==