When looking at the circle of an astrological chart, put the earth and yourself (use your imagination) in that little circle in the middle. We would be at the top of that little circle. In Barack Obama's chart, below, the Moon, Venus, Mercury, the Sun, Uranus, Pluto, Mars, and Neptune were above the horizon at the time of birth, appearing in counterclockwise order. The Moon is about to set, then Venus, Mercury, and the Sun will set, then the rest of those traveling through the sky in the clockwise motion.
Now let's imagine what is underneath the horizon. It's dark because the sun is overhead, right? If he were born at midnight, the Sun would be straight down underneath the earth. B. Obama's Jupiter-Saturn conjunction is there, in the 3rd house, with Jupiter in the sign of Aquarius and Saturn is in Capricorn, the sign of it's rulership. Any planet is strong in the sign of it's rulership as long as there are no counter-acting placements or aspects to weaken or overdo the planet's expression.
Over on the left side is the Ascendant or Rising Degree. See the letters AC? You might be familiar with the glyph for Scorpio which looks like an "M" with an arrow-like 'tail'. The planet Neptune, whose glyph looks like Poseidon's trident, is rising in the 12th house.

These are some very strong planets in Obama's chart, especially in the Midheaven, straight overhead. The Sun is in it's own sign, Leo. Pluto tends to show up prominently in the charts of rulers or others who are influential in the lives of others, or at least wish they were. The Leo expression gives the calm and poise Obama is known for. Uranus and Mars are also often placed in the Midheaven or Ascendant in the charts of rulers, presidents, dictators, and leaders.

Below you can see Hillary Clinton's chart with only Luna in the Midheaven (assuming the birthtime is correct for this chart). Uranus is on the Ascendant and Mars, Saturn, and Pluto are in a conjunction in Leo in the 2nd and 3rd houses. There is a stellium or group of planets in the sign of Scorpio in Clinton's 5th house.
Notice the themes in the charts of Obama and Clinton? Leo and Scorpio, Sun and Pluto.


Below we have John McCain's chart. The planets of Mars and Pluto were overhead in the 10th house, close to the Midheaven. The Sun is in Virgo with Neptune. Jupiter is in the 2nd house in it's sign of rulership of Sagittarius giving a boost to Mars next to Pluto in the 10th. It's those fire planets again, as well as Pluto, ruler of Scorpio.

All 3 of these candidates have a potential temper. The fire planets and Pluto, who is so comfortable in a position of power even if it has to hide underground to wield it, give that tendency. Typically, these kinds of people will express their anger pretty easily and then the anger will subside. No hard feelings. Those who do not express or deny that anger or temper can only keep it in check for so long before it blows when some little thing makes them lose control, or the anger will settle in toxin layers in the body causing ulcers, high blood pressure, and other health problems related to stress.
These charts make for strong leadership potential. We can observe from the sidelines to see how they've all learned to focus aggression and passion in their lives. I've seen some rudeness come out in various interviews, which would be an expression of anger.
These charts are so interesting, with so much potential for good or otherwise, and this is only scratching a tiny bit of the surface. When getting to the 'truth' in a chart, you consider each planet, certain points of strength or weakness, positions of fixed stars, midpoints between 2 planets, the planet or star's sign and house as well as relationships (aspects) to other stars and planets, and there are many different techniques for advancing the birth chart for future trends or forecasting. I hope this put the idea of Sun-sign astrology in it's proper very, very weak light for you. There are endless possibilities in the way planets and points interact. No 2 are the same. Twins are a special matter, of course. What about time twins? Two people of different environmental and heritage influences born at the same time and place (in a hospital or wherever). Those make some interesting stories!
Astrologers have had to deal with reactions to their statements about people's character or things to come since the time of Abraham. Some had been accused of being in a conspiracy when they cautioned that some public figure may be in danger. I think most would just offer the insight into these tendencies or trends in an effort to help. There are just those kinds of indicators in one/some of the candidates charts. I won't use names because I am not trying to 'go tabloid' here, and it does not advance the art and science of astrology in the way it needs to be treated to make spectacular predictions. It's not about making predictions though some have and continue to do so. It shows tendencies or trends. There are choices as to how to handle, or ignore, the possibility.
Suffice it to say that I hope all the candidates and their family members campaigning with and for them are not scrimping on security. Security is essential in these campaigns. There is much intensity with the excitement these candidates produce. The potential for trauma exists. I truly feel that maintaining the strongest security possible and using common sense about personal safety should be strictly adhered to. I am not trying to induce fear and I hope that is not the result. We've learned these lessons in the past. Personal safety and security are crucial for the candidates, family members, and others in their vicinity.
Let's pray for goodness, power, and Light.