Cook County Republicans can have a bad reputation for corruption. Consider the town of Cicero, which has been solidly Republican since the days when Al Capone lived there. 

Betty Loren-Maltese inherited the job of Town President of Cicero from her husband, Frank Maltese, who had to resign after his conviction on mob-related gambling charges. (He died of cancer soon after.) A newspaper reporter found out that Loren-Maltese had bought a house in Las Vegas for $1 million, on a salary of $85K.

The US Attorney discovered that Loren-Maltese, the Town Treasurer, the Town Attorney, the Police Chief and his predecessor, and a couple of mafiosi had robbed the town of $12 million.

The replacement as Cicero Town Attorney, Ed Vrdolyak, former Chicago Alderman, former Democrat (now Republican), was convicted of fraud and was in the same cell block as former Governor George Ryan (R). His replacement as Town Attorney overbilled  the town of $2 million, but got off with just disbarment.