The Demon Sheep or Demon Sheep ad is a political ad created as part of Carly Fiorina's 2010 campaign for the United States Senate. The ad gained international attention for its characterization of Fiorina's opponent as a wolf in sheep's clothing, portrayed by a man wearing a sheep costume with glowing red eyes. Although opinion remains divided as to the effectiveness of the ad in supporting Fiorina's campaign, it is widely regarded as one of the most bizarre and memorable political advertisements ever devised.