Rally ending song used to be, "You can't always get what you want", by the Rolling Stones, IIRC, but the Stones threatened to sue if trump kept using their songs:
https://www.forbes.com/sites/andrewsolender/2020/06/28/all-the-artists-who-have-told-trump-to-stop-using-their-songs-at-his-rallies/#137b4cd174b8
YMCA, by the Village people, is replacing that, apparently.
Good message, fun song, black group, anyone can do the letters with their arms while dancing and YMCA can be replaced by MAGA easily. Don't know what the arm letter G would look like, though.
The Yankees ground crew dnaces to this, or used to dance to this, when the cleaned up/raked the the infield between one of the innings. Could very well be Trump picked it up from that.