InsideClimate: In the months before the debut of the new documentary film "Merchants of Doubt," long-time climate denialist Fred Singer contacted more than two dozen bloggers, public relations specialists and scientists asking for help in derailing the documentarys release. "Can I sue for damages? Singer asked in an email last October. "Can we get an injunction against the documentary?" Singer is one of the "merchants of doubt" identified in the documentary, as are a number of other recipients of his email....