Mayor Lori Lightfoot announces that schools will close Thursday after her administration fails to reach deal with the Chicago Teachers Union. [Heather Cherone/The Daily Line]

Mayor Lori Lightfoot started her day at 8 a.m. Wednesday by announcing that negotiations between the city and the Chicago Teachers Union had broken down and that schools would be closed Thursday in anticipation of a strike.

By her third and final appearance in public at 6 p.m., Lightfoot had notched several victories — but huge challenges remained.

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