New York-based ad firm Omnicom and Paris-based ad firm Publicis merged on Sunday, creating the largest advertising firm with $23 billion in combined revenue. The merger might create complications since it will bring together rival clients, such as Coca-Cola and Pepsi, Procter & Gamble and Johnson & Johnson, and AT&T and Verizon. We have analysis.

Sen. Dick Durbin says the U.S. House of Representatives' bill to cut funding for the Great Lakes Restoration Initiative by 80 percent would severely impact programs created to address ecological problems facing the Great Lakes. Programs to keep Asian carp out of the lakes would be slashed, among others. Elizabeth Brackett has the details. Read a fact sheet.

Author Rebecca Sive joins us to discuss her leadership guide for women, Every Day is Election Day: A Woman's Guide to Winning Any Office, from the PTA to the White House. Read an excerpt.

Chicago artist Leo Segedin, 86, is still painting about his childhood on the west side, and dancing into old age. We revisit Jay Shefsky's profile. View a slideshow of some of Segedin's favorite pieces, handpicked by the artist himself.

We share your thoughts about the fire marshal's proposal to change sprinkler code requirements in Illinois in tonight's Viewer Feedback.

The first potential Democratic challenger to Gov. Pat Quinn was Bill Daley, who officially announced his candidacy on July 30, only to drop out of the race on Sept. 16.

State Sen. Bill Brady announced his third run for governor on June 26, 2013.

Kirk Dillard officially announced his second run for Illinois governor on July 15, 2013.

On June 2, 2013, Illinois Treasurer Dan Rutherford officially threw his name in the mix for the Republican gubernatorial primary. 

Joel Weisman and his panel of journalists discuss the week's top headlines. Check out our weekly roundup with links to all of our stories from this week.

Joel Weisman and his panel of journalists break down how Chicago Public Schools CEO Barbara Byrd-Bennett, Chicago Teachers Union President Karen Lewis, and Mayor Rahm Emanuel are responding to the CPS budget crisis. Watch the web extra conversation.

A concert at the zoo, lots of used books, and a festival for kids at the Art Institute; Chicago Tonight knows what's going on this weekend.

Did Illinois business leaders lobby ratings agencies to lower the state's bond rating? Paris Schutz has the latest details on a bizarre twist in the pension debate.

There’s a battle raging over the Illinois State Fire Marshal’s plan to require all residential and business buildings taller than four stories to be retrofitted with sprinkler systems costing hundreds of millions of dollars. Churches, restaurants, and any building used for gatherings of 50 or more people would also be required to add sprinklers. Opponents say the expense outweighs the fire safety benefits. Eddie Arruza and his guests analyze both sides.

When she was 13, Karsyn Terry took second place in a national, 14-and-under pool tournament. In the 24 years that this tournament has existed, Karsyn is the first African American to make the finals. Now, after a year of intensive training with her father, she is going for first place this weekend. Jay Shefsky has a profile. Read an article.