Can You Sue if You Get Banned for Political Reasons?

Washington DC says political affiliation is a protected class. If they were to implement these policies, could you sue if you were banned for political reasons? That's the interesting thing. Is that a state's right thing? Didn't a Santas do something like that in Florida where if you are running for office and you get banned, you can sue. The thing is the defense will just be, well, we ban them for something else, right? Instead of political reasons. But it's not working because as we saw with Alex Berenson, when he sued,. I guess the ruling was they have to explain what they did because you have a contract with them.