It is an un-written rule and routine for #45 regime.
Everybody already knows to lie and cover for the godfather.
There is never a need to tell individually.

controlling dolt that he often can't stop himself from getting his own hands dirty because of his impulse to get into the details to prove who is the boss.

Thus he directly dictated Don Jr.'s adoption lie about the Trump Tower meeting, and added the Russian investigation reference to the written note firing Comey.

He also has no filter between his addled brain and his flapping mouth or his frenetically tweeting fingers.

the lies that they were supposed to lie about, including lies about the former since contradicted lies that they lied about, etc., etc.,

Mueller didn't leak anything to Buzzfeed, probably the source is SDNY.

And we already know truth means nothing to him

I know which way I would go and its a no brainer choice.

Don Jr's "adoption" excuse for the Trump Tower meeting, was written on Air Force One by Trump himself along with Kushner, Hicks et al. One of his staffers even resigned over that incident, not wanting to be connected to what he believed was felony obstruction.

And if Trump did it in that case, we would be foolish to assume it is the only instance.

When filling out their security clearance forms ? Because everyone did, by not disclosing all their russian meeting , and all trumps meeting with putin , and all the businesses deals they were trying desperately to get with putins approval , and intentionally lied to cover up all their meeting and contacts up, and probably destroyed evidence too. Trump lied over and over again about it all.