The Forty-Eighters who immigrated to the United States impacted the country economically and politically.
What if the Decembrists, their families, and their middle-class supporters had emigrated to the United States and the Poles who revolted in the November Uprising along with their families and supporters had emigrated to the United States as well?
John Quincy Adams, who was ambassador to Russia, would be President when the Decembrists first arrive.