Author J.K. Rowling attends photo call ahead of her reading from "The Casual Vacancy" at the Queen Elizabeth Hall on Sept. 27, 2012, in London. NEW YORK -- J.K. Rowling's passion for free expression is so strong it extends to someone she'd otherwise not care to discuss: Donald Trump. Speaking Monday night before hundreds gathered for PEN America's annual gala at the American Museum of Natural History, the "Harry Potter" creator noted that she opposed a recent petition calling for banning the presumptive Republican presidential nominee from entering the United Kingdom, saying such actions endanger everyone's rights.