" I guess that no one else finds it the slight bit curious that this guy has been under investigation for, what, 4 years and it's only stuff that he's done very recently that brought charges against him??? "

Obama helped push for an ethics reform bill in Illinois (yes, he was paying some attention to his home state during the campaign)which was to put curbs on campaign contributions.   The Gov., seeing that his funds would dry up, started to push for "donations" before the reforms took effect. People started talking, the feds started investigating, and guess what they found!