Here's The Thing

An amalgam from the Twitterverse:

Bolton cleverly hid the evidence where 45* would never find it - in a book.

But no, seriously now: his minions were aware of it, because Bolton had to submit his manuscript for review by the national security folks.

So the White House knew about it all along, which is another reason they ignored subpoenas and threatened Exec Privilege to keep Bolton from testifying.

They knew. Which means McConnell knew. Which makes it pretty obvious why Republicans are acting like such dicks - again - still - by refusing to allow witnesses or documentary evidence in the impeachment trial.