To convict, certainly you need proof beyond a reas. doubt. To criminally refer or even indict, you need NOTHING even close to that. Indeed, to “prove” anything, you need a jury or a judge—the referral or indictment stage clearly does not involve either.
Remember, Comey is a Republican and totally expendable. I'll give him two days before he resigns or takes a walk in Marcy park.
I do think he is unstable at this point.