(Credit: Facebook) If Mark Zuckerberg wants to win over liberals and become president in 2020, he’ll need to convince them that his PR gaffe trying to promote virtual reality by using Puerto Rico as a backdrop does not represent his core values. In a Facebook Livestream on Monday, Zuckerberg and Rachel Franklin, Facebook’s head of social virtual reality, appeared as cartoon avatars while they took viewers on a tour of various locations that they could visit with Spaces, their new “social virtual reality” tool, according to The Guardian.