She also became interested in astrology as the First Lady. She used the services of Joan Quigley who was an astrologer. In 1981, her husband faced an assassination attempt. This made Nancy rely on astrology. She tried to influence appointments and movements of her husband based on astrology. At that time the White House Chief of Staff was Donald Regan. He did not find this very useful. There was a struggle between Donald Regan and the First Lady. Donald Regan resigned in 1987 because of this.