Three months after the authoring of that bill with Cantwell, Ensign voted with Republicans who voted as a bloc against extending the expiring Investment Tax Credit for renewable energy.

http://www.senate.gov/legislative/LIS/roll_call_lists/roll_call_vote_cfm.cfm?congress=110&session=2&vote=00190

Finally at the end of 2008, Baucus wrapped it into the last-minute version of the must-pass Bush bank bailout bill, and that is how they finally got the extensions through.

http://www.matternetwork.com/2008/10/bailout-failure-brings-last-chance.cfm

John Sununu, who did vote with Democrats was voted out by Republican voters.

Your other examples are Reps (in the House). The Senate is the problem, where the filibuster is paralyzing action.

E.g.,

“AWEA gives special thanks to Senators Harry Reid (D-NV), Charles Grassley (R-IA), Max Baucus (D-MT), Byron Dorgan (D-ND), Kent Conrad (D-ND) and Jeff Bingaman (D-NM) for recognizing the PTC as an important national priority and ensuring its inclusion in the tax bill passed before Congress adjourned for the year. On the House side, the leadership of Rep. Bill Thomas (R-CA), Charles Rangel (D-NY) and Jim McCrery (R-LA) was critical in gaining an extension of the PTC.”

http://www.awea.org/newsroom/releases/Congress_extends_PTC_121106.html

“The language containing the extensions was authored by Senators Maria Cantwell (D-WA) and John Ensign (R-NV) and is called the Clean Energy Stimulus Act of 2008. The language, which was attached to the housing bill as an amendment, has bipartisan support to extend the commercial Investment Tax Credit (ITC) for solar and fuel cell projects for eight years and removes the utility exemption.

…

The bill also extends the residential solar credit for one year and removes the US $2,000 cap. The bill now has 30 co-sponsors, including members of the GOP who have opposed previous attempts to pass a tax credit extension such as Sen. John Sununu (R-NH).”

http://www.renewableenergyworld.com/rea/news/article/2008/04/senate-passes-housing-bill-with-ptc-itc-extensions-included-52144

And there are lots of Republicans who support nuclear power.

http://www.matternetwork.com/2008/9/mccains-50-votes-against-clean.cfm

Republican voters strangely tend to take out their Senators if they support clean energy: Chafee(NH), Smith (OR), Coleman(MN), Specter(PA) (after first trying to switch to a Democrat), were eliminated by voters. Graham is now under intense pressure. I think the only reason the Maine girls Collins and Snowe manage to hold on is that Maine is 55% renewable. It counteracts the fossil industry maybe…

I’m taking it pretty much for granted that the deadline will be extended. Or if it isn’t, next year there’ll be some sort of replacement. There’s bipartisan support for various sorts of clean-energy subsidies, if not for putting a serious price on fossil-carbon emissions.