Bernie Sanders supporters aren’t taking this whole superdelegate thing lying down. Despite a tie a blowout win against Hillary Clinton, Sanders trails her by some 350 delegates in the overall count, thanks mostly to superdelegates pledging to support her. His backers have taken to creating a MoveOn.org petition to pressure the superdelegates to be flexible. It reads: “Commit to honoring the voters—let everyone know that you won’t allow your vote to defeat our votes. Announce that in the event of a close race, you’ll align yourself with regular voters—not party elites.” So far it’s attracted 162,000 signatures. Related: At FiveThirtyEight, Nate Silver notes that in 2008, Clinton had a 154-50 superdelegate advantage over President Obama when New Hampshire voted. But “by the time Clinton ended her campaign on June 7, 2008, Obama had nearly a 2-to-1 superdelegate advantage over her,” owing in part to many pledged delegates who switched their support to Obama.