Frank Denholm standing by the Denholm Waterfowl Production Area sign

Denholm Waterfowl Production Area sign

People standing in front of Frank Denholm's campaign headquarters

Frank Denholm standing in front of his campaign headquarters

Frank Denholm standing in front of his campaign headquarters

Denholm trucking business offered twenty four hour service and was owned by Frank Denholm

Three young volunteers handing out Denholm campaign pamphlets during a 1970 parade

Frank Denholm speaking to the National Farmers Organization in Miller, South Dakota

Frank Denholm shaking hands with South Dakota constituents

Denholm Seed Company sign in a field of flowers

Denholm Seed Company building

Denholm for Congress supporters are carrying signs during a rally

Frank Denholm and others on stage during a Denholm for Congress rally in Brookings, South Dakota

Elect Frank E. Denholm for U.S. Congress 'A New Strong Voice for South Dakota - Farmer - Businessman - Former FBI Agent - Educator - Lawyer (Democratic Candidate for all the people!)' campaign billboard

Elect Frank E. Denholm for U.S. Congress 'A New Strong Voice for South Dakota - Farmer - Businessman - Former FBI Agent - Educator - Lawyer (Democratic Candidate for all the people!)' campaign billboard in Brookings, South Dakota

Campaign billboard 'This man . . . Denholm U.S. Congress' with a 'Thank You!' on it after Frank Denholm won the race for the U.S. Senate seat in 1970

Campaign posters in the windows of the Democratic headquarters in 1970

Frank Denholm and South Dakota State University president Hilton Briggs

Richard Kneip and Frank Denholm during the 1970 campaign

Richard Kneip and Frank Denholm during the 1970 campaign

Richard Kneip and Frank Denholm during the 1970 campaign