Dingell (technically from Michigan) is usually known for opposing anything opposed by the automakers. But he's decided to propose what is actually a pretty reasonable cap-and-trade plus carbon-tax model. He's basically told everyone that he expects it to fail, but he has endorsed the arguments in favor. And he's at least giving it a chance, and there's an opportunity here to educate the public, and our representatives. Friends of the Earth has an easy auto-letter page, or you could go send a direct note through your Representative's website, or call them up.
(Note: The ball started rolling on this a couple months ago; I'm not sure how I missed it then. But apparently it's now actually being introduced.)