A Nation Under God? The ACLU and Religion in American Politics questions the claim of the ACLU that the First Amendment to the Constitution requires the complete cleansing of any religious expression in the American public square. That position, Krannawitter and Palm argue, is not consistent with the principles of the American founding, but derives from early 20th century progressivism and modern liberalism that requires ultimately a reconstituting of the American regime along completely secular lines. A re-examination of the American founding, its theoretical and constitutional principles, allows for limited religious expression without violating the constitutional principle of religious liberty.