In 1904, Brown was appointed to the
Georgia State Railroad Commission by then-Governor
Joseph M. Terrell. That appointment was rescinded in 1907 when the new Governor,
Hoke Smith, removed Brown over disagreements about passenger fares. Brown exacted revenge by running against Smith in the
1908 gubernatorial election and winning. Smith again won the governorship in
the election of 1910 by beating Brown in the Democratic primary and in the general election in which Brown ran as an independent. Smith left before the end of his second term to assume the
United States Senate seat that became vacant upon the death of
Alexander S. Clay, and Brown ran unopposed to become Governor again for the rest of Smith's original term. Brown faced Smith once again in
the 1914 election for the Senate seat previously filled by Smith. Smith won that election. Brown also wrote two books,
The Mountain Campaigns in Georgia (1886) and
Astyanax (1907), served as director and vice president of the First National Bank of Marietta, and owned and operated Cherokee Mills in Marietta. On August 17, 1915, Brown was involved in the lynching of Jewish factory manager, Leo Frank. Frank was accused of murdering his coworker Mary Phagan. The lynching occurred after Frank's sentence was commuted from the death penalty to life in prison. Prior to the lynching, Brown played a key role in instigating violence towards Frank in the
Augusta Chronicle and the
Macon Telegraph. Commenting on the commutation of Frank, Brown stated: "the necessity will be upon the people to form mobs and execute them properly." ==Death==