In a case that could send shock waves through the U.S. auto industry, 12 states and the District of Columbia want the U.S. Supreme Court to order the federal government to regulate greenhouse gas emissions from automobile tailpipes... Several auto trade groups have come out against the states, including the Alliance of Automotive Manufacturers, which represents General Motors Corp., Ford Motor Co., DaimlerChrysler AG, Toyota Motor Corp. and five other automakers... Automakers declined to comment on the case, deferring to the alliance.