Mac Miller had a hit with 2011's 'Donald Trump'.
The Donald liked it at first, but then changed his mind and threatened to sue Mac for royalties.
To promote the reissue of his Best Day Ever mixtape, Miller has edited video of Donald Trump to make it seem like he's singing Donald Trump.
As you can hear, Miller switches up some of the lyrics to bring the track into 2016, and to also make it more of parody of Trump's unusual political bombast.