The paragraphs that follow answer the same questions with respect to unconstitutional legislation by Congress that were answered with respect to unconstitutional legislation in the ten states (Colorado, Massachusetts, New Hampshire, Minnesota, Wisconsin, North Dakota, South Dakota, Illinois, Indiana, and New York) included in my study published in 1943 under the title, Unconstitutional Legislation in Ten Selected States. The congressional statutes and the decisions of the Supreme Court analyzed herein are based upon the list found in Professor Charles Grove Haines, The Doctrine of American Judicial Supremacy. The reason why this list was chosen as the basis for analysis was that it covers approximately the same period, namely, from the beginnings to the early thirties, not including the period of the New Deal which formally began in 1933. This does not mean that there is no point in analyzing the later statutes and decisions, but that for purposes of comparison it was thought safer to restrict this analysis to the same general period for both state and national materials. The three cases under No. 1 in the Haines list have been omitted because no decrees based on invalidity followed their decision.