“On the day of the mass murder of 11 human beings at the hands of a deranged ‘nationalist’, you played his song Happy to a crowd at a political event in Indiana. There was nothing ‘happy’ about the tragedy inflicted upon our country on Saturday and no permission was granted for your use of this song for this purpose.” With that letter sent by his lawyer, Pharrell Williams became the latest in a long list of musicians who have told politicians to cease and desist using their songs at political rallies. But like those before him, Pharrell might find that his efforts to hit the mute button will not have a happy ending. From The Guardian: Can’t always get what you want: why artists struggle to stop politicians using their songs.