Andrew Jackson (March 15, 1767 – June 8, 1845) was the seventh President of the United States (1829–1837). He was commander of the American forces at the Battle of New Orleans (1815), military governor of Florida (1821), and eponym of the era of Jacksonian democracy. He was a polarizing figure who dominated American politics in the 1820s and 1830s. His political ambition combined with widening political participation by more people shaped the modern Democratic Party. Renowned for his toughness, he was nicknamed "Old Hickory". As his early career was based in developing Tennessee, Jackson was the first President primarily associated with the frontier.
A statue of Andrew Jackson stood in Jackson Square in New Orleans, the city of Jackson's great victory in 1815. FBS agent Neil Michaels saw the statue when he arrived on a secret mission in 1942. By order of the city's first military governor Benjamin Butler, the statue bore the inscription "The Union must and shall be preserved", a paraphrase of Jackson's famous statement "Our Federal Union, it must be preserved."
After the Marx brothers' fell back into the past and helped save the Fredonian Rebellion in 1827, Julius Marx realized that Andrew Jackson was scheduled to be elected president the following year. Marx also realized that Jackson would be sympathetic to the slave-holding Fredonia, would probably fight the Mexican government, and would certainly be unsympathetic to the Cherokee who'd allied themselves with Fredonia.
While Governor-General Jackson's first name is not given, the description of his face as "grim," and the general time frame of his office, make fairly clear that the authors intended to describe Andrew Jackson.