When the President of the United States relies on the stars it tells me that he lacks faith in God and God's guidance. I could not imagine President Carter, a truly religious man, relying on a horoscope.
God in his wisdom protects us from knowing the future, except for the rare gift of prophecy. The Bible speaks of false prophets, including stargazers.
Reagan relies on the stars for everyday activities which shows weakness and " Aberglauben ," or "unfaith," the German for superstition.