American Freedom Party (1922-1941)
After the end of the First Great War, people in the USA and CSA wanted to move on with their lives. No one wanted there to be a war again and the USA would eventually rescind the CSA's war debts during the beginning of the Sinclair Administration. From 1921 to 1933, both nations attempted to reconcile with each other through a sharing of U.S. and Confederate culture. In the states of Houston and Kentucky, a new political party was developed to help former Confederates integrate to American society. The American Freedom Party was founded some time after the creation of the Freedom Party (Dresser) in the Confederate States. Despite the name, the party was a pro-US and pro-CS organization. The name "American" referred to citizens of both countries, since they both considered themselves to be Americans. Before U.S. victory in the First Great War, terms such as "the Union" and "Unionite" were still used to refer to the United States and U.S. citizens, respectively.
During the rise of Featherston, the party became more influential in Houston (state) and Kentucky by gaining seats in Congress. The party was influential in helping Houston and Kentucky to vote returning to the CSA. Sequoyah also had strong support for the party among the Native Sequoyahns, but it was mostly underground due to American immigration into the U.S. territory. The party adopted nearly every exact platform that the Confederate Freedom Party had, such as Anti-Black sentiment, plebiscite demands, Pro-Capitalism, and Anti-Socialism. Where they differed was their commitment to peace. The party campaigned strongly against any war between the American nations. It's flag was that of a reverse-color 35 star U.S. flag.
However, once war between the USA and CSA started and when evidence emerged of the mass killings of Black Confederates, the party was disbanded due to overwhelming unpopularity. The party mostly remains a large footnote in USA history and its symbolic flag has never been made illegal to show in the United States, although the more educated person would probably frown and shake their head upon viewing such a sight.
Parallels:
https://en.wikipedia.org/wiki/German_American_Bund
https://en.wikipedia.org/wiki/America_First_Party_(1943)