Chicago : School police chief tells union , ` ` We will resolve this . '' Chicago : A mayor 's spokeswoman says talks are continuing into the night . 30,000 teachers and other staff went on strike after failing to reach a contract deal . The strike harms schools unnecessarily , Chicago 's mayor says .
NEW : School board chief tells union , `` We should resolve this tomorrow '' NEW : A mayor 's spokeswoman says talks are continuing into the night . 30,000 teachers and other staff went on strike after failing to reach a contract deal . The strike harms children unnecessarily , Chicago 's mayor says .