The Tea Party member serves as Donald Trump's spokeswoman, frequently appearing on cable news to defend the controversial candidate.
She has a habit of saying things almost as controversial as the things Trump says.
Recently, this racist tweet of Pierson's from the 2012 election started getting some attention online again.
It prompted some killer responses...
People told her to think about her own family's heritage.
One Twitter user noted this "pure breed" talk was oddly reminiscent of a certain Harry Potter antagonist.
The similarity was not lost on Harry Potter author/Queen of Twitter J.K. Rowling, who fired off this incredible tweet on Sunday.
You might remember that this isn't the first time Rowling has made her thoughts known on Trump.