"Meredith McIver" is allegedly a public speaker who apparently is too timid to speak to the public. Whether she existed or not was briefly the subject of speculation a week ago when a letter was produced by the Trump campaign in which she took the blame for plagiarism in Melania Trump's convention speech.
Once it was established that there actually, apparently is (or was) a Meredith McIver, the whole plagiarism flap -- with its denials and fabrications -- was sent to the memory hole for shredding and incineration.
"It was all a joke." or some minion in the bowels of The Trump Organization "took responsibility" [without, of course, having to, you know, take any responsibility]
One of the mainstays of the Trump campaign -- and of the right-wing propaganda wurlitzer in general -- is the devaluation of truth. This is not simply a matter of saying things that aren't true for political advantage. It is an enduring strategy of demonstrating the futility of standards of truth, rightness and truthfulness because they realize that communicative rationality is not their friend.
It is not enough for them to "get away" with a falsehood. The point is to show that the truth does not matter. This is not mere dishonesty. It is an assault on the idea that there is any criteria for distinguishing between truth and falsehood.