Hatch practiced law for one year in
Harrodsburg, Kentucky. Hatch moved to
Hannibal, Missouri, in 1856 and opened a law office with a partner named Campbell. He was elected as Circuit Attorney of the
Sixteenth Judicial Circuit of Missouri in 1858 and 1860. By 1862, Hatch enlisted with the
Confederate States Army in the
Civil War. He was made a commissioned captain and assistant adjutant general under General
G. W. Smith in December 1862, and in March 1863 was assigned to duty as assistant commissioner of exchange of prisoners under the cartel, and continued in this position until the close of the war. He was promoted to Lieutenant Colonel in 1864. In 1872, Hatch ran for governor of Missouri, but lost. Hatch was elected as a
Democrat to the Forty-sixth and to the seven succeeding Congresses (March 4, 1879 – March 4, 1895), during which time he served as chairman of the Committee on Agriculture (Forty-eighth through Fiftieth and Fifty-second and Fifty-third Congresses). He was an unsuccessful candidate for reelection in 1894 to the Fifty-fourth Congress. After his congressional career, he engaged in agricultural pursuits. ==Personal life==