Oath of Office vs Voting Record

Article VI of the U.S. Constitution states: "The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and the several States, shall be bound by Oath or Affirmation, to support this Constitution;". 

The New American magazine sponsored by the John Birch Society maintains and publishes "The Freedom Index" that rates Congressmen based on their adherence to constitutional principles of limited government, fiscal responsibility, national sovereignty, and a traditional foreign policy of avoiding foreign entanglements. Listed below are the scores for the South Carolina members of the 116th Congress. 

Senator Lindsey Graham 58%
Senator Tim Scott 69%
District 1 Joe Cunningham 25%
District 2 Joe Wilson 58%
District 3 Jeff Duncan 80%
District 4 William Timmons 78%
District 5 Ralph Norman 74%
District 6 James Clyburn 20%
District 7 Tom Rice 62%


Kentucky U.S. Representative Thomas Massie has a Freedom Index of 99% so an excellent score is possible. Why should South Carolina residents tolerate elected officials who fail to keep their oath of office?