Social media companies are not politically bias. Social media companies act as a message board for user generated content. The content and its creator may be politivally motivated, but social media as a whole actually provides a space for both sides of a political issue to discuss ideaologies
It has been shown in previous election cycles that social media can be used to turn public opinions to one party,
But the choice is still down to the individual, they must become informed themselves and not rely on social media for their political news