@layman,
Give Mueller time, first he has to document the crime--which involves the Russians who have been indicted--then the next step would be to identify any Americans that assisted or colluded with them.
And Rosenstein, on Friday, hinted that was coming when he urged everyone to view the ongoing findings in a non-partisan
patriotic manner. That suggests the next revelations might be Americans and might be jolting.
Actually, anyone who is genuinely patriotic should want Mueller to take his time and build the strongest possible cases against anyone involved with tampering/meddling with our election process--and expose
all possible culprits.
Meanwhile, I think the evidence Mueller has piled up thus far does have people wondering about the answer to this question.