With a hearing set for Friday, Cook County Circuit Court Clerk Dorothy Brown vowed to keep fighting and win a spot on next month’s ballot after elections officials found she did not collect at least 12,500 signatures. Meanwhile, candidates Bill Daley and Gery Chico focused on the Chicago Public Schools, earning criticism from the Chicago Teachers Union, and Toni Preckwinkle found herself under fire for touting her role in exposing the murder of Laquan McDonald by a police officer.