A quick hit:
back in 2000, I repeatedly ran into Bush supporters who argued with a straight face that there was nothing wrong with what Katherine Harris was doing in Florida. After all, she had won the election to be the Secretary of State, so she had the power to do what she wished, even if that meant putting all of her energies into making sure George W. Bush was elected.
This argument was advanced in all sincerity! When I tried to argue that she was supposed to serve the interests of the citizens of Florida and maintain fair elections, that criticism was laughed away as being hopelessly naive. "The Democrats would do the same thing" I was told, and numerous people made vague references to JFK's triumph in 1960 as if that were the only proof they needed.
I guess they skipped the "Two wrongs don't make a right" part of ethics instruction.
Anyway, what is going on now at DoJ is directly analogous to what Harris did in Florida in 2000. Harris then, and Gonzales now, have been using the power of the state to directly advance the interests of the Republican party instead of the interests of justice. At DoJ, this is most dramatically seen with the various USAs who were fired either for refusing to investigate Democrats or for having the gall to investigate Republicans. But a lot more of this kind of "party first!" thinking has been going on.
What's my point? Anybody who is surprised at all the scandals that have arisen with Bush wasn't really paying attention during the Florida recount, when it become perfectly clear that Bush had no respect for the rule of law and was utterly focused solely on advancing his own interests at every step. As usual with this kind of thing, Republican projection launched the identical complaint at Al Gore, and the GOP-friendly media lapped it up.
I think it's naive to assume this problem will go away once W. and his family move to extradition-safe Paraguay after he leaves office.