YES! Obviously! Because if the campaign could show that a single email was altered, it casts doubt on the entire set. Many people would immediately jump to the conclusion that many emails were altered and disregard the story entirely.
The AP is confident that one of the documents from podesta's inbox was altered. Yet the campaign never came forward to authenticate the original document. So we have a clear case of altered email, but campaign didn't authenticate original.
It's a political calculation. You may have done it differently, but it's pretty clear we have at least 1 case of it happening.
