Observation on TV ads in SC

The majority of ads we are seeing are for either Lindsey Graham or his challenger Jaime Harrison. The race is a statistical tie.
The Dem ads drive home Graham’s hyper-support of Trump, someone he called a “xenophobic, race-baiting bigot” and a clown in the 2016 primaries. Every ad includes Trump and Graham, asking “What happened to Senator Graham?”

The Graham ads, on the other hand, never mention Trump, and try to tie Harrison to AOC and Pelosi (even though a Senator would have no real involvement with any of them.)

What does it say about Trump’s popularity and campaign when a Republican doesn’t want to be tied to him in deep red South Carolina?