John Armstrong is the Democratic candidate for Springfield's 24th Congressional District's Congressman.
Presumably from the Springfield area, he runs for Congress after Horace Wilcox suffers and dies from a heart attack. Krusty the Clown and John Armstrong run to take his place. In the beginning, John is well-liked over the then-terrible candidate Krusty. He mud-slung Krusty for offensive ads, and it seemed like he had the election. However, Lisa helped Krusty appeal to the common man, thus winning the election over John.
At first, he was well-liked. However, FOX disliked him for his political party. He was always winning until Lisa helped Krusty.
- He shares his name with John Armstrong, Jr., who ironically became a Congressman.