The problem with this argument is an inversion of the private and public sphere. Campaigning is an inherently public activity; running Facebook ads that only a tiny targeted audience can see is different. It removes public accountability. twitter.com/kreissdaniel/s…
This is an argument @zeynep made a long time ago and has really stuck with me. In the past, politicians campaigned in public, while voters deliberated in private. Now our deliberations are in public spaces, while politicians can whisper different things in each voter's ear.
We're used to this fight in the context of campaign funding—we recognize that anonymity and secrecy in campaign funding are bad for democracy. But we haven't learned to cope with the ways social media lets politicians secretly and anonymously target once-public campaign speech.
It is a structural problem of social media, and Facebook in particular, that has nothing to do with party. It is destabilizing to democracy to give politicians a tool that lets them whisper a different promise in every ear.