Except he was right about it being rigged via wikileaks. Rigged via the media, rigged via paid protestors by HRC's campaign, rigged polling (blatantly evident now), rigged/illegal superpacs, rigged clinton foundation money, rigged primary against bernie... He didn't have to make up anything.
He's evidently very skilled at fostering loyalty with people who'll believe pretty much anything in exchange for the kind of compliments they've never gotten much.