If there were a billboard top 100 for policy ideas, the Green New Deal would be at the top of the charts for several weeks running. It's not a policy, or a bill--more like aspirations that combine swift action on climate change with broad social and economic reforms. Alexander Kaufman has been covering the Green New Deal for the HuffPost, and he joins us to talk about what it tells us about where our politics -- and possibly the climate itself-- are heading.