"The fact is there is no more money. Period," says Chicago mayor Lori Lightfoot. She's talking about the teachers' strike that has paralyzed her city's public schools—enrollment 360,000—for the past week. The public employee union is demanding more: more money for salaries (only eight states pay teachers more than Illinois), more support staff (Illinois ranks first in spending on administrators), more teachers per student. Their cause has attracted national attention. Elizabeth Warren joined the picket line.