1978Final results
1978 election for Arizona's 3rd District
U.S. House · Arizona
Robert Stump (D) won with 85.0% of the vote, defeating Kathleen Cooke (Lib) by 69.9 points.
Robert StumpDemocrat · winner
85.0%111,850
Kathleen CookeLibertarian
15.0%19,813
131,663 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 1978
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET