Nothing bugs me more than when so-called progressives have their own litmus test on political issues. In the last two days, blogger Joe Romm has taken his fellow climate advocate, Jim Hansen, to the woodshed (see here and here), because of Hansen's vocal opposition to cap and trade. One irony is that Hansen, in this commentary published yesterday, uses the same blunt rhetorical language that is characteristic of Romm's blogging style. No matter. Hansen, who argues that a carbon tax is far superior to cap and trade as a solution to global warming, is off the reservation. (Romm is an equally vocal proponent of cap and trade and dismisses carbon tax as politically untenable, and thus unworthy of serious consideration.) Now one would think this a healthy debate to have in a democracy. Not Romm. This headline from today's post tells you everything you need to know about the terms of debate that Romm (and like-minded climate advocates) have set for all discussion on climate change politics and policies: Memo to Hansen 2: Why is the country's top anti-science blog reprinting your stuff? It's the ultimate litmus test: