that all federal legislation must, before becoming Law, be presented to the president for his or her signature or veto, Article V provides no such requirement for constitutional amendments approved by Congress, or by a federal convention. Thus the president has no official function in the process. In Hollingsworth v. Virginia (1798), the Supreme Court affirmed that it is not necessary to place constitutional amendments before the president for approval or veto. Three times in the 20th century, concerted efforts were undertaken by proponents of particular amendments to secure the number of applications necessary to summon an Article V Convention. These included conventions to consider amendments to (1) provide for the popular election of U.S. Senators; (2) permit the states to include factors other than equality of population in drawing state legislative district boundaries; and (3) to propose an amendment requiring the U.S. budget to be balanced under most circumstances. The campaign for a popularly elected Senate is frequently credited with "prodding" the Senate to join the House of Representatives in proposing what became the Seventeenth Amendment to the states in 1912, while the latter two campaigns came very close to meeting the two-thirds threshold in the 1960s and 1980s, respectively. Ratification of amendments After being officially proposed, either by Congress or a national convention of the states, a constitutional amendment must then be ratified by three-fourths (38 out of 50) of the states. Congress is authorized to choose whether a proposed amendment is sent to the state legislatures or to state ratifying conventions for ratification. Amendments ratified by the states under either procedure are indistinguishable and have equal validity as part of the Constitution. Of the 33 amendments submitted to the states for ratification, the state convention method has been used for only one, the Twenty-first Amendment. In United States v. Sprague (1931), the Supreme Court affirmed the authority of Congress to decide which mode of ratification will be used for each individual constitutional amendment. The Court had earlier, in Hawke v. Smith (1920), upheld the Ohio General Assembly's ratification of the Eighteenth Amendment—which Congress had sent to the state legislatures for ratification—after Ohio voters successfully vetoed that approval through a popular referendum, ruling that a provision in the Ohio Constitution reserving to the state's voters the right to challenge and overturn its legislature's ratification of federal constitutional amendments was unconstitutional. An amendment becomes an operative part of the