While circulation is heaviest in the Twin Ports metropolitan area, delivery extends into northeastern Minnesota, northwestern Wisconsin, and Michigan's Upper Peninsula.The present incarnation of the Duluth News Tribune is the outcome of the merger and takeover of several earlier publications.[2] In 2006, The McClatchy Company purchased Knight Ridder Inc., acquiring the Duluth News Tribune in the process.[10] The McClatchy Company decided to sell 12 of Knight Ridder's 32 daily newspapers, including the Duluth News Tribune and Minneapolis' Star Tribune, due to a company acquisition philosophy limiting purchases to "newspapers in fast-growing markets.The Duluth News Tribune is available daily in an on-line form, and is printed twice weekly for mail delivery on Wednesdays and Saturdays.