CHICAGO — Chicago Mayor Rahm Emanuel on Friday replaced his hand-picked schools chief after just 17 months on the job, a move that comes shortly after a bruising teachers' strike that has taken a toll on the district's bond ratings and as school closings loom.

Reports had surfaced weeks ago that Emanuel was not happy with Brizard and that their styles clashed. Emanuel at the time denied Brizard was on the way out but Brizard approached Chicago Board of Education president David Vitale concerned that speculation over his future had become a distraction.

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