The best possible President would be one born under the sign of Plato. A lesser known sign, it is a subset of Libra. Only persons born on October 17 come under the astrological influence of Plato. It's symbol, corresponding to the Libra scales, is the micrometer.
Platonic persons tend to be ruthlessly logical, passionately devoted to justice, and incorruptible advocates for the general welfare. Their kindness and compassion are equaled only by their determination to protect, by any means necessary, those exploited by human greed or victimized by human evil. They also share the general Libra love of the arts, and take great joy in exercising their creative talents. Typically, their greatest possible fault is a sometimes seen too-great-love of their own singing, or poetry.
Platonic persons are in general born philosopher kings.