American unionism

American unionism, not to be confused with labor unions in the United States, is an ideology on the preservation of the legitimacy of American federal government encompassing all states and opposition to individual secession. American unionism has historically been existent during the American Civil War period and Reconstruction period of American history, but has also been affirmed by Supreme Court of the United States decisions, such as Texas v. White. Unionism in the United States arose primarily from the attitudes following Lincoln–Douglas debates, particularly Abraham Lincoln's House Divided speech.