He can't. It is way too late. The time to prevent this kind of malfeasance was in early 2001, when a president normally would have had the sense to rinse the trolls and moles out of sensitive positions throughout the executive branch. Leaving the network of Clintonoid operatives largely intact within the government may have been the single worst error of the Bush administration.
I agree. The past 7 years have been nothing more than an intermission in the middle of the Clintons' term. That's all this has been about.