It's far from "over" tomorrow even if Hillary wins every state except Vermont, it won't "kill" Bernie's campaign. Although, it would drastically hurt his campaign and any momentum he had. Still he has more than enough money and supporters to last until June, when the last primary is. Bernie did mention staying in the race that long, which might be futile at that point, but who knows!
If Hillary drags Bernie tomorrow theres literally no chance he wins the nomination unless the FBI throws Hillary in prison.
