Portal:Conservatism/Selected anniversary/September
- 21st
- 1854 – the United States Republican Party is founded. The party opposed the expansion of slavery, called for free homesteads to farmers ("free soil"), and sought to modernize banking, railroads, and industry.
- 27th
- Law of Free Birth, a measure championed by Rio Branco
- 29th
- Republican Party members on the steps of the United States Capitol.