Edward Kavanagh served as Governor of Maine, assuming office in 1843 and concluding his term in 1844. His tenure was marked by significant administrative responsibilities during a period of transition. Kavanagh's contributions to the state were recognized through the historical preservation of his residence in Newcastle. His life and career are noted for their impact on the region, evidenced by his interment in St. Patrick's Catholic Cemetery, Damariscotta Mills.

Edward Kavanagh's political career reveals a penchant for unexpected alliances, particularly in environmental regulation debates. His legislative record shows a highly calculated approach to protecting regional industrial interests. Kavanagh's rhetorical style is marked by a distinctive blend of localism and broad coalition-building, often surprising his contemporaries with unorthodox alliances.