Obama: One of the most important challenges I think our democracy faces is: how do we regain some common sense of truth—not absolute truth, but rough, basic truth? Because if you can't… and I think one of the most pernicious things that has happened is, we have a situation now where we're not just arguing policy or values or opinions, but basic facts are being contested. And that is a problem, because then the marketplace of ideas of the democracy doesn't work. And that further undermines trust,