Conservative political commentator Robert Novak announced Monday he has been diagnosed with a brain tumor, less than a week after he struck a pedestrian with his Corvette and drove away. Robert Novak at a party marking the 40th anniversary of Novak's newspaper column at the Army Navy Club in Washington, D.C. in this June 2003 file photo. Novak says he has been issued a $50 citation after hitting a pedestrian while driving in downtown Washington. Novak tells WJLA-TV he was cited for failing to yield the right of way. He says he didn't realize what happened and continued driving until a bicyclist stopped him. David Bono, the bicyclist who witnessed the incident, told The Associated Press that the pedestrian was hit in a crosswalk and was splayed across Novak's windshield.