 He was again a member of the State Senate (3rd D.) from 1840 to 1843, sitting in the 63rd, 64th, 65th and 66th New York State Legislatures.Root also served as Major-General of the New York State Militia.On October 4, 1806, Root was married to Elizabeth Stockton (1788–1871), a daughter of Charles W. Stockton and Elizabeth (née North) Stockton.