It appears that this was a little known, never used, provision that enables a President to expunge portions of the official Congressional Record if it is deemed to be harmful to National Security!
Well, he is going to exercise his RIGHT and obviously Congress will not be able to do anything about it because the Democrats do NOT have the votes.
This means that future textbooks on U.S. history will have to omit any mentions of the Impeachment because there will be NO official Congressional Record of it. Just media reports and that has been discredited as FAKE NEWS!
As far as the official historical record Donald Trump was never impeached.