I got this story from reliable inside sources (my uncle works as a janitor at the appartment building of Mr. Trump's cleaning lady's sister-in-law). I read a couple of sources and it all checks out:

On 22 September 1979, an event occurred near the junction of the South Atlantic and the Indian Ocean. At first it was thought it was low-yield nuclear test. In fact, it was impact of an extraterrestrial object. The event became known as the Vela Incident (German die Welle = The Curl). [link to en.wikipedia.org]

At the time, Donald Trump was sailing around that area on his yacht and as it happens, the ET object landed on his head. At first it was glowing blue but it soon adapted to hair surrounding it and got orange-blondish hue. [link to en.wikipedia.org]

It soon started to take over Mr. Trump's body and mind. It caused his first financial breakdown and ruined two of his marriages. [link to en.wikipedia.org]
ET life form wants to take over the Earth, therefore it's making Mr. Trump to run in the presidential elections in 2012. [link to en.wikipedia.org]

It's following simple logic: If it takes over U.S.A. all the other countries will follow its demands no questions asked. It wants to wipe human race off the face of the Earth, so its race will colonize our planet and use its sources, which they can't produce on their own. They are especially interested in cationic polymers (ingredients of hair gels) which are their staple food. [link to en.wikipedia.org]

And so it begins...