The photo is copyrighted. To use it for commercial purpose (not “fair use, educational, etc.” permission from the copyright holder must be attained. The PAC has assets, and can get their “assets” sued off for illegal use of copyrighted materials.
Yes, someone paid for use of the pics, and Trump has proof of who it was. He named the guilty party.
So buying the rights to the photo isn’t illegal is it? It sounds like the PAC legally bought the rights for a political ad, so what? My point is if you pose in the nude ( or nearly in the nude) then you shouldn’t be surprised if it is used to question your character.