You will, no doubt, find plenty of people who trust Obama to not do this. You'll find plenty of people who would have trusted Bush, and you'll even find a lot of people who don't trust either one of them. But there's a fourth corner to that square, and I don't think you'd find many people in it at all: people who would trust both Bush and Obama with data like this.

That's the thing about governments: people have successors. People like Bush and Obama have been elected before, and given enough time, people like them will be elected again. Trusting one administration with a given power means trusting all future administrations, sight unseen, with that same power, and that is rarely a sane thing to do.