Members of the Chicago Teachers Union have voted to authorize a strike, which could come as early as Oct. 7. Here are six things you should know.

Chicago Teachers Union backed Toni Preckwinkle for mayor of Chicago, donating nearly $300,000 to her campaign in 2019. But Lori Lightfoot won – and now CTU is threatening to go on strike despite being offered a generous deal.

Teacher strikes are illegal in 8 of the top 10 largest school districts in the nation. Maybe that’s why a third Chicago Teachers Union strike in seven years looms.

Two of the nation’s largest government union strikes in the past decade happened in Illinois – both by the Chicago Teachers Union. And now a bill in the General Assembly would give Chicago teachers more chances to go on strike.

Six years after last threatening to strike, the teachers union walked the picket line – a collective bargaining tactic not allowed in any of Illinois’ neighboring states.

A District 211 board member is sitting in on negotiations with the same teachers union that bought her campaign signs during the 2017 District 211 school board election. But much more than yard signs, Illinois' collective bargaining laws for government worker unions stack the deck against local taxpayers.

A government worker union in West Chicago will vote Jan. 26 whether to authorize a strike for District 94's 141 high school teachers. A strike would leave over 2,000 students in the lurch - a tactic not allowed in any of Illinois' neighboring states.

Illinois has enshrined a "right to strike" in state law, effectively giving government worker unions the power to shut down government services to get what they want. The latest example: A teachers' union in West Chicago may go on strike in February to force 22 percent pay raises over the course of the next contract.

Illinois’ unfair collective bargaining laws led to a five-year contract offer on the eve of a strike vote.

A potential strike by Teamsters Local 700 – which represents snowplow operators in Chicago – could have a disastrous impact on travel and safety in the city. Unlike neighboring states, Illinois law enshrines this “right to strike,” thereby giving government worker unions enormous power in bargaining.