Author J.K. Rowling is known for her scathing quips toward people who say things that are sexist, racist, homophobic or generally awful. Also she wrote the very, very famous Harry Potter Series.
This time she tweeted back to a Donald Trump spokeswoman who made a zenophobic remark regarding Americans born outside the U.S. who are (or would like to be) leaders of the country.
Ouch, Katrina Pierson. You need a freezing spell for that burn?