Sam, it reads that Melania liked and repeated the words from Michelle, verbatim, that Michele used in the same convention venue when Michele was the speaker, as the wife of the Democrat nominee.
McIver either did not realize that Melania was using Michele’s words verbatim, or Melania didn’t make it clear enough.
A professional speech writer would picks up on these things, be it Peggy Noonan, or any other long time professional Republican speech writers. They are paid to research phrases and paraphrases.
I am guessing Melania may not have realized plagiarism is a special concern for any and all national and international speeches, or else McIver was oblivious to her responsibility, as an assistant writer for the speech, to research the words Melania was repeating, and that McIver was “writing down”.
The failure was one of not hiring a responsible speech writer of high reputation who would be aware first and foremost of the basics of legal pitfalls associated with plagiarism.
Maybe it proves that now is the time to expand the team to a few professionals besides only Manafort. He can not be held responsible to single handedly run a General Election campaign and micromanage every word and phrase in every TRUMP family speech. There are pros out there to construct the specialty work.
Sorry for the lack of editing in my comment, there.