The race was close and the Chicago Board of Elections has been counting ballots since the election over a week ago. Mrs. Burke was separated from her opponent, Clayton Harris III, by fewer than 1,600 votes.
Mr. Harris was endorsed by outgoing Cook County State's Attorney Kim Foxx. Axios says that Mrs. Burke's victory signals "a rebuke" of Mrs. Foxx.
Mrs. Burke will face Republican Bob Fioretti in the general election in November.