John Cunningham served in the United States Air Force Reserve and held legislative positions in both the Washington House of Representatives and the Washington State Senate. He has a background in public service and has been married to Margaret Catherine "Maggie" Snyder, who passed away in 2021. Cunningham's career spans several decades, indicating extensive experience in governance and legislative processes.

John Cunningham's political career reveals a penchant for bridging ideological divides, as seen in his legislative record. His approach often juxtaposes progressive environmental policies with support for regional economic interests, showcasing an ideologically agile stance. Cunningham's rhetoric frequently emphasizes community resilience and local empowerment, suggesting a highly localized focus. His unexpected alliances and policy combinations hint at a calculated strategy to balance competing priorities.