When Dick Cheney appears before Congress to answer questions about his actions that caused the death and maiming of hundreds of thousands of people, some from incompetence, some as a result of outright lying- -- then he can come talk to us about Hillary Clinton testifying again.
Liberals are right to criticize Republicans for politicizing Fast and Furious. Conservatives are right that Democrats would have called for Gonzales' head if he'd been implicated. Instead we should recognize that the executive branch, regardless of party, sees itself as above the law.
Excluding from the pardon power persons who have worked for the administration will prevent the president from covering up illegal acts -- making it less likely that officials will carry out illegal acts in the first place.