The flagging system has good intentions, but seems like it was designed assuming good faith behavior from users. It does not appear to be resistant to partisan brigading.
I think it's working as intended in terms of HN not being a place for partisan issues and discussion in the vast majority of cases. There's literally an automatic downvoting of submissions where the comment to vote ratio is too high. It's not the type of discussion HN wants or is intended for.
This is one of the unspoken assumptions of online communities, that will cease to be true, and lead to the implosion or imposition of rules on HN, which will lead to its fracturing.
There is no running away from certain conversations, especially when your information ecosystem is intentionally made partisan. The flavor of american political discourse is architechtured to achieve very clear rhetorical and emotional goals.
At best, HN can choose how it wants to handle the schism. For that everyone needs to realize it is coming.
Are you talking about HN or the constitution and our resultant system of government?