The AARP represents about 40 million seniors, making it one of the largest special interest groups in the nation. But it has been pushing back hard against opponents of health reform with a series of ads that depict foes as malicious, shadowy "special interests" maneuvering black SUVs to block the path of an ambulance. "We won't stand idle when opponents of health care reform attempt to scare or mislead the American people," says AARP Executive Vice President Nancy LeaMond in the voiceover.