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According to Wikipedia article on the American Catholic Church of the United States (ACCUS), if that is what you mean, it notes that there are quite a few differences between the ACCUS and the Roman Catholic Church.
I have a feeling that ACCUS is Catholic in a sense that it observes the seven sacraments, but it disagrees with the Roman Catholic Church on certain sexual-related issues, or at least the article appears to be focused that way. Call it a "liberal" version of the Roman Catholic Church, though any split-off group of the Roman Catholic Church would probably be recognized as Protestant despite the similarity of the theological traditions.