Lois will need a Presidential pardon, or she will be prosecuted by the next administration.
This question needs to be asked of every presidential candidate. "Will you prosecute Lois Lerner, and Eric Holder, and every other member of the Executive Department who have obviously chosen to use "memory lapses" to lie to or to ignore the legitimate powers of Congress?
The Constitution defines treason in Article 3, Section 3, Clause 1: Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.
Check out the entire thing :
No pardon is possible as a "preemptive crime"
If she hasn't been indicted and found guilty, no pardon can apply. Blanket pardons, as far as I have learned, cannot Constitutionally exist.
The only remaining question is, what is the statute of limitations for Treason or "Abuse of Power," as impeachable offenses?