Actually, that's not correct. Trump's campaign, "Re-elect Trump Inc." or whatever it's called, they are the ones that have to buy the license.Seeing that just about every arena in the U.S. licenses the same song list... and the Trump campaign rallies have been held in these arenas with the licensing..... then the campaign has nothing to do with paying license fees or royalties. Can you site one example of the Trump campaign playing songs they have no license to or have paid no royalties for in an arena. Despite previous claims like this and noise from the left -- the reality is that all the previous assertions were proven false since the arena holds the playlist license for every event held there.
There's different rules for sporting arenas, civic centers, etc. Their licenses are only good for events they sponsor. Trump rents the place. Its different. There are all different categories of ASCAP licenses. You are thinking of the type that is licensed to a bar or nightclub.
Since Trump takes his traveling medicine show all over and rents the various venues, his campaign is the one required to hold that license. I think it's called a "conventions and expositions" agreement and its valid for a negotiated period of time.
Either way, they can't technically stop him.... ALTHOUGH... there is a gray area there as these events do in fact get televised.. but that might even be covered too if the network in question also has a license. Which I'm pretty sure they do.