The American Prospect - The Oregon Voting Revolution:
"Oregon’s vote-by-mail system came of age on a cold, drizzly night in January 1996. It was the night of the special election to replace the disgraced Bob Packwood in the U.S. Senate with Gordon Smith, the charismatic Republican vegetable farmer from eastern Oregon, facing Ron Wyden, the wonkish Democratic congressman from Portland. It was a classic match up of the two men who, as it turned out, would both represent Oregon in the Senate for the next decade after Smith won the state’s other seat in November 1996."
