This so called investigation, ie witch hunt is a security investigation, not a criminal investigation, so what does a grand jury in DC have to do with security?

This witch hunt because Mueller is looking for a crime, because there isn't any evidence that a crime took place. Under the US code for a Special Counsel, a crime has got to have occurred first. Where the evidence of a crime? To say that's what Mueller is look for makes this a witch hunt. Crime, then investigation, not investigation then crime.