"We're all really proud of our system. It's the world's oldest democracy, and we've always had to fight to make it real," says Michael Waldman of the Brennan Center for Justice. "But in the last 10-20 years and especially recently we've seen challenges to the right to vote and challenges to the role of big money in politics. That means we have to fight for democracy all over again." What can young people do to help get our democracy back?