Easiest way is visit your local Election Board and change your registration to Independent. (Several states call it “Unaffiliated”).
Then maybe send the RNC a blunt, concise invitation to pound sand. Maybe even provide the sand, if you’re feeling generous. :-)
Why bother? The Democrats & the lickspittle Republicans are now in control of all three branches of our, scratch that, the government and there is no way anyone outside of their little peerage is going to get in.
I doubt I will bother voting again. A complete waste of time.
I am tempted to change my registration. However, I also like working as an election official on election day, so I will keep my Republican registration.