They obviously dont want his identity out as he is rumored to have worked with Biden, in the past decade. Bwahahahahahahaha!
They don’t want him/her to have to answer Republican member’s questions which may, (will), prove it’s all a lie and choreographed withe Schiff and the Dems, Written questions allows the lawyers to compose the answers so that the liar won’t make a slip of the tongue.
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If you really want a laugh, check out the Biden pic at the bottom of the article ... LOL!
REPORT: Joe Biden Had Working Relationship With Whistle-blower