Given the name-recognition that Armando Iannucci has most deservedly won in the UK, this is addressed more towards all North American armchair political strategists...
I ain't asking you to flush your principles or become so ruthlessly realpolitikal that you make Rahm Emmanuel look like Bob Ross. But if you want to know how the game is really played, you need to watch The Thick of It RIGHT NOW.
So if you're in it not to win it, but genuinely to make a difference for the benefit of humankind, understand that this is the level of PR opportunism, ideological schizophrenia, and sailor-mouthed sociopathy that you're up against.
Good luck! You'll fucking need it.