The very act of political candidates coming out on stage to populat music like wrestlers seems bizarre enough to my non-American brain. The fact that they don’t seem to realise they need permission to use licensed works when they’re trying to run a country is even more bizarre.
I don’t know about this case, but in the past, the candidate had purchased a block of rights from a record company so they had the rights to use it but something about the way those contracts work allows the original artist to forbid them from using it even after purchasing. I’m not an expert by any means though.