According to the US Constitution federal election laws regulate the election of members of Congress.
The Constitution of the United States in Article 1, Section 4, grants the States the power to regulate, through what it is known as federal election laws, the congressional election process. Section 4 also establishes that both Congress and State legislatures can regulate the “times, places, and manners of holding elections for Senators and Representatives”. The federal election laws that the Constitution gives in order to regulate the election of members of the Congress cover all the aspects of the voting process, such as voter registration, prevention of fraud and methods to organize the results. The Constitution also gives the guarantees and rights for voting and for participating in a Congress election regarding citizenship, residency and age requirements.