Since the United States has theoretically no police power, and since the federal Constitution is essentially a political document, the national judiciary must in the main use political clauses of the organic law as the basis for nullifying statutes. While clauses of this nature are thus frequently made to serve as a basis for the decisions, the great majority of statutes nullified by the United States supreme court have pertained in fact to economic and social rather than political matters. While the court has nullified in all about thirty-three federal statutes, the scope of this discussion will permit of a summary only of the more important statutes which have directly affected political questions.
The political principle of separation of powers has afforded the basis for the nullification of seven federal statutes. All these decisions have, however, affected the power and jurisdiction of the court itself; and in every jurisdictional case, with but one unimportant exception, the court has refused to accept authority which congress attempted to bestow upon it.
While the court has thus almost uniformly limited its authority in the jurisdictional cases, in one instance the principle promulgated was most momentous—the one laid down in Marbury vs. Madison.