What climate activists can learn from the NRA and the gun-control wars

I've been thinking about writing a post along these lines, when someone far more knowledgeable on the subject beat me to the punch.

Here is a Grist post by Robert J. Walker, the former president of Handgun Control, Inc. (now the Brady Campaign to Prevent Gun Violence), who "helped to lead the fight for passage of the Brady Handgun Violence Prevention Act of 1993 and the 1994 federal assault-weapons ban":

[Italics are mine.  Bold in original.:]

Supporters of climate-change legislation have much...