'In 1982, Durbin won the Democratic nomination for the now-eliminated 20th congressional district, which included Macon and most of Springfield. He scored a 1,400 vote victory, defeating 22-year incumbent Paul Findley, a U.S. Navy veteran, whose district lines had been substantially redrawn to remove rural farms and add economically depressed Macon, replacing 35-percent of the voters[3][4] and include more Democrats as part of the decennial redistricting.'
https://en.wikipedia.org/wiki/Dick_Durbin