Asa Fowler graduated from Dartmouth College and pursued a career in law, practicing in partnership with Franklin Pierce. He served in various political roles, including clerk of the New Hampshire State Senate and member of the New Hampshire House of Representatives. Fowler also held judicial positions, serving as a justice of the New Hampshire Supreme Court. He was involved in revising New Hampshire’s laws and was a delegate to the Peace Congress in Washington, D.C., in 1861. Fowler transitioned between the Democratic, Free Soil, and Republican parties before returning to the Democratic Party.

Asa Fowler's political journey is marked by ideological fluidity and strategic positioning, switching from the Democratic to the Free Soil Party and then to the Republican Party before returning to the Democrats. Fowler's legislative efforts, especially in revising New Hampshire's laws and advocating for public education, suggest a commitment to localized governance. His participation in the Peace Congress highlights a nuanced approach to national conflicts, balancing moral opposition with pragmatic regional interests. Fowler's career reveals a politician adept at navigating and leveraging party affiliations to advance his policy goals.