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.

Conservative and controversial, the billionaire Koch brothers are said to be eyeing Tribune Company's newpapers. Kris Kridel of WBBM Newsradio 780 and 105.9FM has that story, and more top business headlines.