In 1866, McEnery began practicing law in Monroe. He became active in the Democratic Party, and served as its chairman in
Ouachita Parish. He was elected
lieutenant governor in 1879, and became
Governor of Louisiana in 1881 after the death of
Louis A. Wiltz. McEnery was elected to a full term as governor in 1884, but failed to be re-elected in 1888. McEnery's administration was weak because of the power wielded by the State Treasurer
Edward A. Burke and the
corrupt Louisiana State Lottery Company. Despite Louisiana's
Roman Catholic plurality (and majority in
Acadiana and many of the southern parishes of the state), McEnery was the last Catholic to be elected governor prior to
Edwin Edwards in 1972. After losing the 1888 election, McEnery was appointed to serve as an associate justice in the Louisiana Supreme Court. He was elected to serve in the
United States Senate in 1896, serving there until his death in 1910. While in the Senate, McEnery served on the Committee of Corporations formed in the District of Columbia and the Committee of Transportation and Sale of Meat Products. He was a member of
The Boston Club of New Orleans. ==Death==