Although the qualifications of electors of Members of Congress are defined by State law,[116] the right to vote for such Representatives is derived from the Federal Constitution.[117] Unlike the rights guaranteed by the Fourteenth and Fifteenth Amendments, this privilege is secured against the actions of individuals as well as of the States.[118] It embraces the right to cast a ballot and to have it counted honestly.[119] Where a primary election is made by law an integral part of the procedure of choice or where the choice of a representative is in fact controlled by the primary, the Constitution safeguards the rights of qualified electors to participate therein.[120] Congress may protect this right by appropriate legislation.[121] In prosecutions instituted under section 19 of the Criminal Code,[122] the Court had held that failure to count ballots lawfully cast,[123] or dilution of their value by stuffing the ballot box with fraudulent ballots[124] constitutes a denial of the constitutional right to elect Representatives in Congress. But the bribery of voters, although within reach of Congressional power under other clauses of the Constitution, is not deemed to be an interference with the rights guaranteed by this section to other qualified voters.[125]
WHEN THE ABOVE QUALIFICATIONS MUST BE POSSESSED
The principal disputes which have arisen under these sections have related to the time as of which members-elect must fulfill the conditions of eligibility, and whether additional requirements may be imposed by federal or State law. Although on two occasions when it refused to seat persons who were ineligible when they sought to take the oath of office, the Senate indicated that eligibility must exist at the time of election, it is now established in both Houses that it is sufficient if the requirements are met when the oath is administered. Thus persons elected to either House before attaining the required age or term of citizenship have been admitted as soon as they became qualified.[126]
Writing in The Federalist[127] with reference to the election of Members of Congress, Hamilton expressed the opinion that "the qualifications of persons who may * * * be chosen * * * are defined and fixed in the Constitution and are unalterable by the legislature." The question remained academic until the Civil War, when Congress passed a law requiring its members to take an oath that they had never been disloyal to the Federal Government. In subsequent contests over the seating of men charged with disloyalty, the right of Congress to establish by law other qualifications for its members than those contained in the Constitution was sharply challenged. Nevertheless, both the House and Senate, relying on this act, did refuse to seat several persons.[128] At this time the principal argument against the statute was that all persons were eligible for the office of Representative unless the Constitution made them ineligible. In Burton _v._ United States,[129] the argument was given a new twist. A law providing that a Senator or Representative convicted of unlawfully receiving money for services rendered before a government department should be "rendered forever thereafter incapable of holding any office of honor, trust or profit under the Government of the United States," was assailed as an unconstitutional interference with the authority of each House to judge the qualifications of, or to expel, one of its own members. The Court construed the statute not to affect the offender's tenure as a Senator, and left undecided the power of Congress to impose additional qualifications (or disqualifications).[130] In exercising the power granted by section 5 to judge the qualifications of its own members, each House has asserted the power to inquire into the conduct of a member-elect prior to his election. In 1900 the House of Representatives refused to seat a person who practiced polygamy,[131] and in 1928 the Senate voted to exclude a Senator-elect on the ground that his acceptance of large campaign contributions from persons who were subject to regulation by a State Administrative Commission of which he had been Chairman were "contrary to sound public policy" and tainted his credentials with fraud and corruption.[132]