n an effort to scuttle key climate legislation being considered by Congress, a mysterious group calling itself the American Energy Alliance is running radio ads targeting 11 key moderates on the House Energy and Commerce Committee. The bill in question — the American Clean Energy and Security Act sponsored by Reps. Henry Waxman (D-Calif.) and Edward Markey (D-Mass.) — would create a cap-and-trade system for greenhouse gas pollution with tougher targets than those proposed by President Obama, promote renewable energy and expand electric vehicle production.