Hmm.... I think it's a mistake to re-name something after a public figure before the person has had a chance to prove his mettle.
It'd be a bit like giving someone a Nobel Prize on the basis of what the prize committee thought that the person will do, or might do, or ought to be able to do. :whistle
Mind you — and I add this in all fairness — the Nobel Prize (and the school re-naming) were not actually Mr Obama's doing.