Lori Lightfoot wins Chicago mayoral race, to become city's first black woman mayor

Former federal prosecutor Lori Lightfoot easily won the Chicago mayor's race Tuesday, earning support from every part of the city to defeat a longtime political insider and become the first black woman and openly gay person to lead the nation's third-largest city.

Lightfoot, who had never been elected to public office, delivered a commanding victory over Toni Preckwinkle, who served in the City Council for 19 years before becoming Cook County Board president. Preckwinkle also is chairwoman of the county Democratic Party.

Lightfoot promised to rid City Hall of corruption...