It's astonishing to me that he chose to have a rally at Madison Square Garden. It must have been a huge ego boost for him to be in his home town, and scads of people went to it--but Republicans don't do well at all in NYC and that's not likely to change as a result of his rally. Was there a great deal of benefit for him? It's unclear. The vulgarity was there, as usual, though I don't think he discussed the penis of a famous golfer this time, hooray, and the racism was prominent, which may hurt him with Puerto Ricans in Pennsylvania.
I do wonder, though--apparently he called out to women who are always in the front row of his rallies--the same women time after time--but called their organization by the wrong name. (Ooops.) So, repeat attenders are part of the show. It does seem that many of his admirers have attended several rallies. (I don't think that's necessarily true of Harris's admirers, but then in the last 12 years she obviously hasn't had anywhere as many rallies as Trump has.) That might explain the phenomenon we've seen again and again, people streaming out of his rallies before he's done speaking: he tends to get on stage late, and if attenders have heard him speak repeatedly and it's getting late, perhaps they think "Well, we got here, but time's a-wastin' and I heard this before" and feel like it's okay to go? It does seem kind of insulting to him, however.