Tim Scott, a Republican senator from South Carolina, responded to Donald Trump's joke he "must really hate" Nikki Haley with a one-liner that set the crowd alive.
Not in this context. It could be in a different context, but not this one. The comparison is about how Republicans are willingly subservient to Trump.
Un·cle Tom ˌəŋ-kəl-ˈtäm. 1. disparaging : a Black person who is overeager to win the approval of whites (as by obsequious behavior or uncritical acceptance of white values and goals) 2. disparaging : a person who is overly subservient to or cooperative with authority.
in a party where they are all competing to prostrate themselves in front of a silver-spoon-in-mouth, draft-dodging, tax-evading, pussy-grabbing, serial sexual assaulter, six-times bankrupt, vulgar, bragging, sexist, criminally corrupt, morally bankrupt, compulsive lying, un-American; in-your-face racist, Tim Scott seems to be going for the title of king lickspittle.
That's certainly why he's a Republican politician. And Trump-slobbering and debasing yourself is basically a requirement, so by that standard, he's certainly a "great" one.