Scott Pelley on CBS just now: "@60Minutes has obtained a letter that indicates" the whistleblower "is under federal protection -- because he or she fears for their safety."— Brian Stelter (@brianstelter) September 29, 2019
Bear in mind who the whistleblower needs protection from -- the crime boss who currently occupies the Oval Office.
But yeah, nothing to see here.
ETA: More detail here