Anybody that says Lady Lindsey is a reliable conservative is out of touch with reality.
He IS,however,VERY smart,and when or if his political position is threatened,he can be very aggressive with his defense.
The Dims DO need to gain Senate seats very badly though,and there seems to have been a lot of leftists move to SC in the last few years,so he might be in trouble unless he gets "loud and proud" of his support for Trump (real or imagined) in order to get the conservatives fired up enough to come out and vote for him again.
I am not from SC and have no idea how real the election threat is to him,though.
I do know that anybody who underestimates him is a fool.