CNN was spinning Trump's "I'll show them" as a sort of threat, revenge. But in context, "They don't know how to win. I'll show them" is ambiguous, and it appears to me, he aims to play the role of tutor, and let anybody who supports his agenda today, even if they didn't yesterday, to come on in and help!
John Roberts reported 7,000 inside the venue, more than 7,000 outside wanting to get in.