CHICAGO (AP) — Cook County is helping heat up a national debate over what to do with suspected illegal immigrants who get arrested.About a month ago, county commissioners ordered the sheriff to ignore all requests from immigration officials who ask for illegal immigrants to be detained after they've posted bond or served their time. The detentions are supposed to give federal agents a chance to pick them up and begin deportation proceedings.Most of those set free were being held on felonies.Opponents of the measure are concerned that suspects who are released could commit more crimes. Supporters say the immigrants deserve to be released as soon as they are eligible and should not be locked up longer than anyone else.