United States Senate election in Missouri 1994 Tags: Election.The 1994 United States Senate election in Missouri was held on November 3 1994. Incumbent Republican U.S. Senator John Danforth decided to retire and not seek re-election. Former Governor of Missouri John Ashcroft won the open seat in a landslide. thumbnail start date 1994-11-03 title United States Senate election in Missouri 1994 Learn more... Loading...