New York Times: Climate change may have sparked its first border war. Two states are in early maneuvers for a potential legal battle over one’s effort to curtail carbon and another’s aspiration to become an energy “powerhouse.” Those divergent designs have driven coal-rich North Dakota to threaten Minnesota with a lawsuit that could rise to the Supreme Court, observers say, while challenging an untested pillar in climate policy: the ability of states to place carbon fees on electricity imported from …