July 31 (UPI) -- Rep. Danny Davis , D-Ill., won't seek re-election after completing his 15th term next year and has endorsed an Illinois state representative to replace him. "We're not going to go away, but the time has come," Davis, 83, said while announcing his pending retirement at a Chicago press event on Thursday. "I want to thank the thousands of people who believed we could make a difference," Davis said, as reported by WTTW . "Chicago, Illinois, has done some marvelous things," he said.