Same was said of Hillary and the response was "prove it". Well that was correct. Hillary should not have resigned until evidence of wrongdoing during investigation was found. If it was found that serious legal issues emerged she should have resigned. There were none and she didn't and that's exactly what should have happened and the same standard applied to Sessions or any public official, be it Obama or Bush or Trump- those you love and those you hate deserve an investigation when the situation warrants. Hell, that applies to you and me.
I don't like these people but the "Dreyfus must be imprisoned because we all know he dunnit" mentality? No. Have an independent investigation and determine facts, THEN act as they demand.