Evidence? Source?
Pharmaceuticals?
Don't you think when a performer is asked to play at a State Dinner they ask what songs he will play? You can't imagine our current President singing a song about Yankee Dogs invading Korea? If you concentrate real hard, I'll bet you can still hear his voice bouncing around the airwaves. He might have gotten a few of the words wrong though as it wasn't up on the teleprompter!