Because Burr was one of the 5 GOP Senators involved in the FBI dossier.
They have told Turtle that if it came out , they would loose both AZ , SC and UT.
Hate the SOB. THEY wouldn’t loose the seat, but this punk Burr would be out.
Aside from Trump, the Freedom Caucus, some potential newcomers and Cruz and Paul, they can ALL go to hell.
They have been unmasked.
Burrr is from NC, not SC.