You know, I'd think that if someone else was passing orders like this,

it might be termed 'obstruction of justice'.
[T]he Justice Department has, for now, ordered two key career attorneys not to comply with a subpoena about the case issued by the U.S. Commission on Civil Rights. The commission, by law, has explicit power to issue subpoenas, and the law mandates that "all federal agencies shall cooperate fully with the commission." The Justice Department, however, is citing internal regulations stemming from a 1951 case to support its order to ignore the subpoena.

One of the attorneys, J. Christian Adams, has been advised by his personal attorney, former South Carolina Secretary of State Jim Miles, that failure to comply with the subpoena could put him at risk of prosecution. "I can't imagine," Mr. Miles told The Washington Times, "that a statute that gives rise to the power of a subpoena would be subjugated to some internal procedural personnel rule being promulgated by DoJ." In short, the department is stiffing the commission and unfairly putting its own employee in a legal bind.
Yeah, I'd think telling someone to ignore a subpoena might cause a 'legal bind'. More, from a piece linked to in the above:
Second, that same day, the two Republican House members with top-ranking jurisdiction over the Justice Department, Rep. Frank Wolf of Virginia and Rep. Lamar Smith of Texas, issued a joint statement calling Justice Department delays "a cover-up," and "a pretense to ignore inquiries from Congress and the U.S. Commission on Civil Rights." At a hearing on Thursday, Mr. Smith said that "continued silence by the Justice Department is an implied admission of guilt that the case was dropped for purely political reasons."

Third, at the same hearing, Rep. Steve King, Iowa Republican, accused Justice Department Civil Rights Division chief Thomas Perez of not being "truthful" while under oath, to such an extent that "there are people who have gone to jail" for such a level of purported "dishonest[y]."
Now, I'm not a lawyer, etc., but I don't think you have to be to know that for a Rep. to basically call a DOJ division chief a liar is a pretty strong statement. He pretty much said "You committed perjury and people go to jail for that." Here's what this is about:
The disputed statement, from what appeared to be prepared remarks by Mr. Perez that he later repeated insistently, was that "the maximum penalty was sought and obtained" against the one Black Panther for whom the charges were not entirely dropped. The bizarrely weak penalty consisted of a mere injunction for the Black Panther not to brandish a weapon near a polling place, within Philadelphia, through Nov. 15, 2012. In short, he is prohibited, only within Philadelphia and only for four years, from doing something that is illegal anyway.
Wow! Such a penalty Holder pushed for! Such a load of steaming crap!
"Holder and them have done a terrible job on this," Mr. Wolf told The Washington Times. "This has just been handled so poorly.... You can't hide these things. There is something wrong here. There is something very wrong. When it all comes out, I think it will be very bad."

The congressman is probably right.
He'd damned well better be, if we're to have any confidence left at all in the justice system.