The U.S. Constitution is a most interesting document. I highly recommend to President Obama and Attorney General Eric Holder to read it.
The president might find that he cannot ignore it and be in accord with the oath of office he took twice as president -- not that this would make any difference to this lawless president.
Holder, who is bound by an oath of affirmation to support the Constitution, would discover that the Constitution is the basic law of the land and that he has no authority to decide which laws he will or won't enforce.
What a sorry administration, most of whom from the president down apparently have never read the Constitution, which they have sworn to "preserve, protect, and defend" and to "support."
Impeachment is the constitutionally provided remedy.