Greenwire: The U.S. Climate Action Partnership drew its mantra from a Rolling Stones song whose lyrics were once posted in the coalition’s conference room in downtown Washington. “You can’t always get what you want, but if you try sometimes, you just might find, you get what you need.” But some U.S. CAP members did not believe — after three years of marathon meetings aimed at reaching consensus on what a federal climate change and energy policy should be — they would ever get what they …