First, were I a restaurant owner it would be a joy to deny service to any of the Bush family, any of the Clintons, Karl Rove, either Podesta brother and surely others not immediately coming to mind. Sarah Sanders is not special that way, Trump people are not special. Forgot, Bannon or dad and Rebekah Mercer. Jarad. Bankster Tim Pawlenty. Orrin Hatch and the executives at UnitedHealth. Steven Miller the Trump hatchet man, (not Steve Miller the musician, who is okay). For Miller's early career mentor, Ms. Bachmann, the joy of saying "Go to Chick-Fil-A" would be immediate and resonant, as a key part of a refusal.
And I would surely rather serve Willie Horton than Lee Atwater. (Of course that one is the most hypothetical because Atwater is dead and Horton is incarcerated.)
There likely would be a booming business among that part of a local populace in agreement on those thoughts.
Second, if being the chief ethics lawyer in the Bush Second's administration, what's the job besides holding a leash on Karl Rove to keep him out of trouble while not restraining any more mischief than necessary. Salute the difficulty, but not taking on the tasking. Ethics in the "Do that and they can get you" sense is more narrow a thing than a common man's view that lying the nation into the Iraq war was unethical. The Bushco crowd did get away with it, but from a personal morality perspective of "ethics," keeping an "ethics" advisory role among those folks and not quitting after half a day, no salute. Ergo, Tina in the primary and, hence, Tina in the general.
From the look of things production of the Dumpster Fire bit could have preceded the Hamlet choice to be or not to be called, for now, a Democrat. That, plus there is the thought that a true and loyal Bush aide might be expected to have a dislike of Trump from the start of how "low energy Jeb" terminology was first launched, and how it succeeded.