Ann Coulter is the way she is because of her Mars conjuncts her Sun. Or so Lynn Hayes, astrologer, thinks. Hayes cast Coulter's chart and surmized:

Ann is a Sagittarius Sun, with Mars, Mercury and Venus all in Sagittarius and very likely her Moon as well. That is a strong stellium in one sign and dominates her chart. Sagittarius (ruled by Jupiter) at its best is visionary, adventurous, bold and optimistic. At its worst, it is judgemental, self-righteous, with a tendency toward self-aggrandisement.

The fault, dear Brutus, is not in our stars,
But in ourselves, that we are underlings