That is because obamium is very strange element. It's origins are unknown, it's has been known to have symbiotic relations with known destructive elements (wrightium and ayersum). And also, to the bafflement of scientists the world over, is able to speak, but only if in front of a teleprompter. It also has parasitic characteristics, when it's area of habitation is under extreme duress, it inexplicabaly syphons off the energy nearby hard working elements to replenish the energy of very large and inactive elements. Sadly, researchers believe they will only be able study obamium until near the end of 2012.