In 1876, Henry was elected as a Democrat to the Forty-fifth, and in 1878 to the Forty-sixth Congresses, serving from March 4, 1877, to March 3, 1881. During the forty-sixth congress, he served as chairman of the Committee on Accounts.
In 1876, Henry became a Democrat and was elected to the Forty-fifth Congress, and again in 1878 to the Forty-sixth Congress. During his service in the forty-sixth congress, he held the position of chairman for the Committee on Accounts.