Ann Romney's Olympic horse

Jan Ebeling of the United States riding Rafalca competes in the Dressage Grand Prix on Day 6 of the London 2012 Olympic Games at Greenwich Park on Aug. 2, 2012. Rafalca is part-owned by Ann Romney, the wife of presumptive Republican U.S. presidential nominee Mitt Romney.

The horse Rafalca is ridden by Jan Ebeling from United States during the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling of the United States riding Rafalca competes in the Dressage Grand Prix on Day 6 of the London 2012 Olympic Games at Greenwich Park on Aug. 2, 2012.

Ann Romney the wife of U.S. Republican presidential candidate Mitt Romney watches the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling of the United States riding Rafalca competes in the Dressage Grand Prix on Day 6 of the London 2012 Olympic Games at Greenwich Park on Aug. 2, 2012.

Jan Ebeling from United States reacts as he rides Rafalca in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

The owners of the horse Rafalca, from left, Ann Romney, the wife of U.S. Republican presidential candidate Mitt Romney, Elisabeth Meyer and Amy Eberling applaud after their horse's performance in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling of the United States riding Rafalca competes in the Dressage Grand Prix on Day 6 of the London 2012 Olympic Games at Greenwich Park on Aug. 2, 2012.

Ann Romney, center, the wife of U.S. Republican presidential candidate Mitt Romney watches the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling from United States reacts as he rides Rafalca in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling of the United States, waves to the crowd after riding Rafalca in the equestrian dressage competition at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling from United States rides Rafalca in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

The owners of the horse Rafalca Ann Romney, center, the wife of U.S. Republican presidential candidate Mitt Romney, Elisabeth Meyer, 2. from right, and Amy Eberling, right, applaud after their horse's performance in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling from United States rides Rafalca in the equestrian dressage competition, at the 2012 Summer Olympics, Aug. 2, 2012, in London.

Jan Ebeling, of the United States, rides Rafalca, in the equestrian dressage competition at the 2012 Summer Olympics, Aug. 2, 2012, in London.

US presidential hopeful Mitt Romney (L) talks to his wife Ann as they attend the men's 400m individual medley heats swimming event at the London 2012 Olympic Games on, July 28, 2012.

US Republican presidential candidate Mitt Romney and his wife Ann wave during the opening ceremony of the London 2012 Olympic Games at the Olympic Stadium, July 27, 2012.