Scott will remain vulnerable only to White Republicans. If none run against him, he is safe.
This is so absurd. Scott won by a bigger margin than Graham in 2014. Nobody can beat Scott. The upstate and Charleston would overwhelmingly vote him in again (even if his opponent were white). Even if he lost out with some racists it wouldn't be nearly enough to knock him out. Not even close. The only way Scott loses is if he gets involved in a scandal.
Not to mention Scott already beat a white guy in a primary before, in a landslide I should add (and he was the son of STROM THURMOND).