WGN-News has an article on the topic https://wgntv.com/2019/04/14/gop-lawmakers-propose-bill-to-separate-chicago-from-illinois/?fbclid=IwAR2m4jUgunQcSyKZbE9DD8cqmlOaSYif60sOx2lTd1WccKZyJ4BPxlwbgqE