A European Union of nation-states would have to create a Parliament that would resemble the US Congress in some respects, a necessity of a legislative chamber of nations that would have more competencies than the American Senate, and a Commission that would be much less powerful than the White House. Moreover it is necessary a European Court that would be as influential as the Supreme Court for similar reasons (the regulatory complexity of an enlarged and socially diversified Union would require detailed interpretation of a principled constitution, cutting short the jungle of existing treaties).