Lori Elaine Lightfoot is an American politician and attorney who was the 56th mayor of Chicago from 2019 until 2023. She is a member of the Democratic Party. Before becoming mayor, Lightfoot worked in private legal practice as a partner at Mayer Brown and held various government positions in Chicago. She served as president of the Chicago Police Board and chair of the Chicago Police Accountability Task Force. In 2019, Lightfoot defeated Toni Preckwinkle in a runoff election for Chicago mayor. She ran again in 2023 but failed to qualify for the runoff, becoming the city's first incumbent mayor to not be reelected since Jane Byrne in 1983.