(CBS) JOLIET, Ill. CBS 2 Political Editor Mike Flannery has filed a complaint after he was shoved and sent down a flight of stairs while questioning a congressman Friday, knocking him into a woman who also fell. The incident happened in Joliet, where Rep. Jerry Weller (R-Ill.) was announcing his intention not to run for reelection. Flannery was pushed by a Weller aide right before he followed Weller into a stairway. The initial contact occurred off-camera. In the video posted on cbs2chicago.com, you can see Flannery stumbing into the view of the camera after being pushed. He is then shoved...