Sarah Sanders is not a protected class. Being a member of the Trump administration is not a protected class. Anyone who continues to be a Trump loyalist at all is not a protected class. By principle I oppose a business rejecting the patronage of a customer on the grounds of race, religion, gender, etc if there's no valid exceptional reason bar mere bigotry. But there's nothing wrong with a restaurant exercising their right to tell a willing member of a despicable administration to go somewhere else.