Yesterday, I went on MSNBC.com’s Greenhouse with Tony Dokoupil, along with Eric Holthaus of Slate, to discuss Obama’s climate legacy and how it’s under threat. Currently, a number of state attorneys general and business groups are suing to block the president’s Clean Power Plan, and Republicans in Congress and on the presidential campaign trail are aiming to undo it as well. Obama’s climate legacy, in other words, is still very much up in the air. Watch: