sentences:  Throughout his life Dennison maintained he had no control over city politics, and repeatedly pronounced that he never hurt anyone.Boss Dennison's thirty-year reign over Omaha politics is seen today as a hallmark in the city's history, causing Omaha to resemble Eastern cities more than other Midwestern cities, including Omaha's neighbor, Lincoln.His death ended the reign of his political machine, causing Omaha to have "formless politics" for the following 50 years.