President Obama may have secured momentum for global action on climate change at Copenhagen with American pledges to reduce emissions, but following through will be a major challenge. "There is no doubt that energy legislation is going to be tough, but I feel very confident about making an argument to the American people that we should be a leader in clean energy technology—that that will be one of the key engines that drives economic growth for decades to come," Obama said in a recent interview with The Washington Post. While there has been some hints of bipartisan support from Sen. Lindsey Graham (R-SC), who is working with Sens. Joe Lieberman (I-CT) and John Kerry (D-MA) on a bill, the poisoned political climate after party-line votes on health-care reform could spread over to the climate debate. "I don't think the Senate has an appetite for another such epic, polarized legislative war this session," Lieberman told the Post.