But that's a self-selecting audience. Facebook users can either look at tending news or ignore it. It's not a political demographic, or if it is, that's incidental.
It's a segment of the populus who have thus far been uniquely positioned to make up their own mind. That has political implications in a democracy that relies on media to shape the electorate's consensus. As Milo Yiannopoulous recently commented on the 2016 primaries: "If the lying mainstream media ever had the power to shape elections, those days are gone." Will that baton be simply picked up by the new media?