I have come to believe, she is the designated conservative and no other conservatives will be allowed by the Republican Ruling Class.
History says Tennessee is a Republican state but is not a conservative state. Conservative Tennesseans repeatedly fail to elect candidates with solid conservative credentials. The voters accept the moderate GOPe types instead.
Even in my very conservative district, true conservatives are rejected for a moderate Republican. When a true conservative was elected, he was rejected for the more moderate Republican Dr Phil Roe