You would have to ask them.
Why is enforcement for Kim Davis done so quickly but enforcement for Lerner and Holder being delayed ( and even forgotten )?
Because the judge could order her jailed. No need for an indictment or trial. Congress can't do that.
RE: Because the judge could order her jailed.
Well, the first question is this -— has the matter been referred to the U.S. Attorney for D.C.?
Secondly, Is the U.S. Attorney for D.C. an independent entity or are they under the DOJ?