I think the Times' account is closer to the truth...
http://www.nytimes.com/2016/07/20/us/politics/melania-trump-convention-speech.html?_r=0
The speechwriters, Matthew Scully and John McConnell, sent Ms. Trump a draft last month, eager for her approval.
Weeks went by. They heard nothing.
Inside Trump Tower, it turned out, Ms. Trump had decided she was uncomfortable with the text, and began tearing it apart, leaving a small fraction of the original.
Her quiet plan to wrest the speech away and make it her own set in motion the most embarrassing moment of the convention: word-for-word repetition of phrases and borrowed themes from Michelle Obama’s speech at the Democratic convention eight years ago.