CHICAGO (AP) -- A spokeswoman for Illinois Gov. Rod Blagojevich says one of his top aides has resigned. Spokeswoman Kelley Quinn on Wednesday said Deputy Gov. Bob Greenlee resigned. The reason for his resignation wasn't immediately clear. Greenlee's resignation comes a day after Blagojevich was arrested on federal corruption charges. Greenlee was promoted to be a top aide to Blagojevich in June, replacing former Deputy Governor Sheila Nix. Greenlee had been a top administration aide previously. State records indicate the 33-year-old Greenlee lives in Chicago and earned $149,000 a year.