Bush's AJ Gonzales testified under oath that he is now disappointed that he politicized the Justice Department:
... but Obama broke from past practice in not replacing Gonzales' hires. (Normally you accept the resignation of the AGs at the start of your term, appoint a bunch based mostly on merit, and then let them serve while on good behavior. Bush changed this by making ideology a specific requirement for his AGs, and then firing those who refused to conduct political investigations )
So we're stuck with not only with AGs so politicized that they now embarass Alberto Gonzales, with the ones who slipped by having been purged by Bush ...is it any wonder that the DOJ is slow to prosecute Bush Administration criminals and continue to persecute Don Siegelman?