Presidential candidates are competing for a win in Tuesday's primary in Wisconsin. James Warren of the Poynter Institute joins us to talk delegate math and what that means for the contenders on both the Democrat and Republican side.

Watch the April 5, 2016 full episode of "Chicago Tonight."

Could a spice help rebuild Afghanistan? Could it decrease the production of poppy for opium? Meet three Chicago war veterans who have started a business with these goals in mind.

Field Museum curators break down the taxonomy of candy in a new "Brain Scoop" video. 

A controversial casting notice for the mega-hit Broadway show "Hamilton" has ignited a firestorm in the theater world. Has the show's nontraditional casting become reverse discrimination?

State Sen. Andy Manar plans to introduce a new school funding formula bill on the floor of the Illinois Senate on Wednesday. The bill, if passed, would shift money from wealthier districts to poorer districts—with cuts to wealthier districts being phased in over four years.

You don't have to be an expert birder or ecologist to enjoy songs and calls from native and foreign birds in Chicago this time of year. Here's what to listen for.

A groundbreaking study partially conducted at Lurie Children’s Hospital of Chicago found that a marijuana extract greatly reduced severe seizures in some children.

Chicago's own Marina City is featured as one of 10 American homes in a new PBS series hosted by Geoffrey Baer that premieres tonight.

Paintings of Chicago by Robert Guinan, who died Saturday, are sought after in Europe and have been exhibited in Rome, Vienna and Paris.

The Chicago History Museum has a whole slew of Abraham Lincoln memorabilia. But until now, at least one item – Lincoln’s family carriage – had not been on display since 1986. See it and the president’s deathbed starting Saturday.

The weather may not reflect it, but it's opening day for baseball. There's big time expectations for Chicago's long-time losing Cubs. WBEZ's Cheryl Raye Stout and Danny Ecker of Crain's Chicago Business have the stats on how the season's shaping up for the Sox and Cubs.

Thanks to fewer potholes this year, the city is already beginning to resurface 55 miles of roads. See a map of the roads that will be resurfaced.

Hear what viewers had to say about the Chicago Teachers Union one-day strike and our story about one teacher who opted out of the strike when we read feedback from the "Chicago Tonight" website, and our Facebook and Twitter pages.