The WH defense did a good job to dismiss Bolton's leaked, unsourced manuscript. I believe it was willfully leaked for the purpose of book sales. It looks like dog eat dog in America when it comes to money and fame. Everybody wants to come in at the eleventh hour with something to add.
This happens even in rice eating Guyana. Get over it. Bolton want to use this impeachment to sell his book.
He actually don’t want to testify, it’s just him creating interest for his book. If he testifies, interest in his story, as outlined in the book, will die. Now it has mystique value.