The League of Conservation Voters (LCV), an environmental group that is an active player in political campaigns, said it would not endorse any member of the House who opposed the climate bill scheduled to be voted on this week. In a statement issued on the climate bill Tuesday afternoon, the League called the American Clean Energy and Security Act “the most important piece of environmental legislation to ever come before the House of Representatives.” The bill would create a cap-and-trade system to reduce greenhouse gas emissions by 80 percent over the next four decades. House Democratic leaders have scheduled a...