George McDuffie of Jefferson.
The Progress Party was a faction of the Continentalist Party led by Jefferson businessman George McDuffie that broke away in 1832. McDuffie and his supporters wished to bring the industrial revolution to Jefferson, but they were opposed by President Andrew Jackson. The economy of the United States of Mexico was based on agriculture and mining, and Jackson wished to keep it that way. As a result, Jackson supported a program of low tariffs, opposed the building of railroads, and also opposed the Sprague Bill, which would have subsidized efforts to find coal in Mexico del Norte and California.
Not long after breaking away from the Continentalists, McDuffie and the other members of the Progress Party merged with the U.S.M.'s main opposition party, the Liberty Party. McDuffie and his followers provided the Libertarians with much-needed leadership and funding in the 1833 Mexican elections.