; (B) a convention or caucus of a political party held to nominate a candidate; (C) a primary election held for the selection of delegates to a national nominating convention of a political party; or (D) a primary election held for the expression of a preference for the nomination of persons for election to the office of President. (4) Federal office The term Federal office means the office of President or Vice President of the United States, or of Senator or Representative in, or Delegate or Resident Commissioner to, the Congress. 6. Relation to other laws (a) State laws relating to voting rights Nothing in this Act shall be construed to prohibit a State from enacting any law which affords the right to vote or the right to register to vote in any election for Federal, State, or local office on terms less restrictive than those established by this Act. (b) Certain Federal acts The rights and remedies established by this Act are in addition to all other rights and remedies provided by law, and neither rights and remedies established by this Act shall supersede, restrict, or limit the application of the Voting Rights Act of 1965 ( 52 U.S.C. 10301 et seq. ), the National Voter Registration Act of 1993 ( 52 U.S.C. 20501 et seq. ), or the Help America Vote Act of 2002 ( 52 U.S.C. 20901 et seq. ). 7. Interpretations favorable to the person seeking to register or vote If a provision of this Act is susceptible to differing interpretations, it shall be construed in favor of the person seeking to register or vote. 8. Severability If any provision of this Act or the application of any provision thereof to any person or circumstance is judicially determined to be invalid, the remainder of this Act or the application of such provision to other persons or circumstances shall not be affected by such determination.