There is one angle of Comey’s statement to consider more carefully, the point at which he said, “...our judgment is that no reasonable prosecutor, i.e., US Attorney, would bring such a case.” The law in question, Title 18 USC, Section 793, is a federal law and, as such, a US Attorney would have to agree to prosecute the case. ALL US Attorneys are appointed by the president; would any US Attorney appointed by Obama be willing to prosecute Hillary Clinton...?
Giuliani was a prosecutor at the highest levels. He just said there was more than enough evidence to indict.