Wikipedia defines common sense as “knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument”
Try to avoid using this topic to express niche or unpopular opinions (they’re a dime a dozen) but instead consider provable intuitive facts.
And don’t forget ‘rich’, or more importantly, supported by the rich. A national-scale campaign requires resources that a typical organization can’t gather, and to win without such a campaign is miraculous in most systems.
Nah, like you said it applies to most democracies, even if America is an extreme example of these universal trends.