Like with proposals to regulate "journalists", what exactly constitutes a politician? For example, I've run for public office before (city council) and I'm inv

Like with proposals to regulate "journalists", what exactly constitutes a politician? For example, I've run for public office before (city council) and I'm involved in a few politically active organizations. Am I a politician? If I am, was it still political advocacy when I talked about the idiotic redudant school built in my ward, as I was not campaigning then? (Just a thought experiment. In practice, Twitter should of course be scourged from the planet.)