The Chicago Teachers Union is fighting mad and pursuing legal action to strike immediately. We get the latest from CTU vice president Jesse Sharkey.

The cost of Illinois’ budget impasse? The income tax would have to go up 100 percent if the state’s debt is to be paid off through revenue alone, according to state Comptroller Leslie Munger. How much longer can the state teeter along without a budget? Paris Schutz has more.

Watch the February 1, 2016 full episode of Chicago Tonight.

White House hopefuls are getting their first test with voters tonight in Iowa, where caucusing is in full swing. Joining us from Des Moines, Iowa to talk about that and more is "Chicago Tonight's" Carol Marin.

A recent Chicago Tribune investigation revealed that just 1 percent of Chicago police officers are responsible for almost a third of all misconduct lawsuits. Joining “Chicago Tonight” to discuss what it will take to hold police officers truly accountable are Lori Lightfoot and Sergio Acosta.

There was a time in Chicago when the accordion was everywhere—and not just for polkas. These days, the accordion is not the powerhouse that it used to be, but there is at least one place where the instrument is still going strong. Jay Shefsky went to check it out.

Hear what viewers had to say about Paris Schutz's interview with Mayor Rahm Emanuel when we read feedback from the "Chicago Tonight" website, and our Facebook and Twitter pages.

Chicago is seeing a rise in high-rise construction with 34 new buildings over 200 feet tall currently under construction. That number has doubled in the last 15 months. What’s causing the sky-high building boom? Curbed Chicago editor AJ LaTrace joins "Chicago Tonight" to explain.

Over the course of five decades, Vivian Maier documented city life by taking more than 100,000 photographs, many of them in Chicago. The now-famous street photographer would have celebrated her 90th birthday on Monday. We revisit our story that introduced “Chicago Tonight” viewers to her incredible images.

Can technology change how we learn? Former hedge fund analyst Sal Khan thinks so. His new approach to learning involves "hustle" and "flipping the classroom." Learn more from the founder of the free, non-profit online learning website, Khan Academy. 

Mayor Rahm Emanuel joins us to talk about the gridlock in Springfield, the financial crisis at Chicago Public Schools and police accountability. Watch the full discussion now.