Climate Hawks Votes is running a primary in which you can chose either Hillary Clinton, Bernie Sanders, or No Endorsement.
The web page where you can vote is here. You are required to enter some identifying information in order to eliminate or significantly reduced gaming of the poll, so the results should be reasonably fair.
There is a tendency for climate hawks (using the term generally, not in reference to this specific group) to favor Sanders on climate over Clinton, because Clinton is not 100% anti-fracking and anti-methane, while Sanders is. However, I think this is a bit unfair.…