Someone earlier complained about Trump using music and the artist complained. Unfortunately, Trump’s campaign paid the ASCAP/BMI fees and they were perfectly within their rights to use the music. I doubt Trump would give anyone (especially David Brock) anything to use against him.
The use of the video was BRILLIANT. He took Hillary’s words of disdain and made it a “badge of honor” for his supporters. Hillary is toast and she did it to herself.