Follow the wives.
Sorry if I missed this already being pointed out.
Rod Rosenstein’s wife = Lisa Barsoomian
“Lisa Barsoomian works for R. Craig Lawrence, an attorney who has represented Robert Mueller three times, James Comey five times, Barack Obama forty-five times, Kathleen Sebellius fifty-six times, Bill Clinton forty times, and Hillary Clinton seventeen times between 1991 and 2017.”
https://stonecoldtruth.com/muller-rosenstein-and-comey-the-three-amigos-from-the-deep-state/