To both experts :

As mentionned by Amanda Hess in the New York Times, a Pew study from 2016 shown most of the Americans were getting their news from social media. Yet, algorithms tend to create ‘filter bubbles’  most users are not aware about, feeding them with one sided articles according to the set of preferences identified, therefore undermining the debate, as points out the former president Jimmy Carter and others.

So, as Facebook and Twitter are not supposed to be partisan sided compagnies, should not political news (or even news in general) and political communication not be submitted to users’ preferences to be pulled up to their news feed, especially in times of elections?

Could they rather be based, for example, on proportionnality?