My understanding is that they didn’t resign as prosecutors...just for this case.
Something tells me it was NOT their idea to resign. Whether Shea was bullied, or went to Barr with objections, or what, these three, imho, just got a beat-down, and it’s not over yet! Barr is cleaning house, and if he WAS bamboozled by Shea, or Shea is on our side, it shouldn’t take long to find out.