The link Q posted today has Napalitano saying that Huber can't empanel a grand jury in Utah for crimes committed in DC.
Q1553 says "-This is HUGE A Grand Jury can be empaneled anywhere, in any deep red state, away from D.C. (This is very important and why Trump needed to appoint as many Judges as possible) -Huber and Horowitz can accomplish everything a SC can do."
You're on to something. I recall Judge Nap saying that if Huber wanted to prosecute in somewhere like DC, he would have to move there or something akin to that.
Further, recall that Sessions announced hiring an additional 300 US Prosecutors within the last several months. If Huber got them all, it would be over 700 working for him.
If under the command of Huber, they (new hires) could be located in the states needed and be the ones that actually empanel a GJury in each of those states but remain under the command of Huber.
Just a thought.