Nothing in the transcript indicates that he’s the whistle blower.
They just asked Taylor if he had met this individual.
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That’s actually good point. I stand partially corrected, because it does not green light the rest of the media to use the name as the “whistleblower”.
It does, however, allow the Senate, DOJ, or other interested parties (private lawsuits) to reference the document to subpoena for testimony.
I don't see how this changes anything. Since Taylor testified that he had never spoken to the guy it might as well have been semimojo that they asked about.
There's nothing in the record to tie this guy to the whole affair, except speculation.