CHICAGO (AP) — An open race to lead the nation’s second-largest prosecutor’s office remained too early to call Wednesday after a heated primary campaign in the Chicago area.

The Democratic matchup for the Cook County state’s attorney primary features Eileen O’Neill Burke, a former appellate judge with a large campaign war chest, versus Clayton Harris III, a professor and attorney who’s held government posts. The winner of the primary in the Democratic stronghold is expected to win outright in November.

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