During the American Civil War, Walton served as the captain of Company E of the 16th and 25th Consolidated Regiments of Louisiana Infantry from January 8, 1864, until the end of the war in the spring of 1865.
He served as Democratic state senator representing Concordia Parish from 1880 to 1884.
Robertson was removed as president pro tempore of the Senate and acting lieutenant governor by a vote of that body on December 24, 1881.
In 1884, Walton announced his support for Republican presidential candidate James G. Blaine and switched parties.
[2] He also ran for Congress for the Louisiana's 5th congressional district on the Greenback-Labor ticket that same year.