I see a telegraphing of massive tension, but not telegraphing to Rosenstein who must know without reading the letter. Rather, this is telegraphing to the public.
Notice the subject matter here too - FBI handling of a Hillary e-mail matter. Wait, isn't he recused from that? Isn't that in Rosenstein's purview? LOL. Nope. I mentioned this a few days ago. Investigating persons in the FBI is not the same as investigating crooked Hillary, not at all.
Sessions has claimed the "investigate and prosecute Comey" turf.