David Roberts at Vox has the story of the carbon tax fight going on in Washington state. It's a doozy. Getting a broad coalition on board with your great idea is usually a prerequisite if you don't want to deliver a pratfall to your favorite policy. Enviros in Washington couldn't (or wouldn't) put in the angst to do this. Here's Roberts' introduction.
His account is rivetting to any elections junky; this is exactly what it is like to try to advance public policy through the initiative mechanism. If you don't build your big tent, you can easily find yourself feeling unsheltered, lonely, and abused. Roberts does well to get and tell the inside story. The left needs to absorb these lessons.