> behalf of the two private clubs who trade off leadership in the US
You've confused the US with the UK. There is no gatekeeping of political parties in the US, no way to stop someone from joining them, and no way to kick them out if they claim to be in it.
You've confused the US with the UK. There is no gatekeeping of political parties in the US, no way to stop someone from joining them, and no way to kick them out if they claim to be in it.
What they do have is primary elections.