Jack White, the singer from the White Stripes, is really upset because Donald Trump used his song in a video without asking.
A lady who works for Trump put a video on the internet showing Trump getting on a plane, and the song "Seven Nation Army" was playing in the background.
Jack White said that Trump and his people are "fascists" and that they will get sued for using his music without permission.
It seems like lots of musicians are mad at Trump for using their songs without asking, and they are taking him to court!
