Ruling in New York Times Co. v. Sullivan, on March 9, 1964, the majority opinion declared, “A State cannot under the First and Fourteenth Amendments award damages to a public official for defamatory falsehood relating to his official conduct unless he proves ‘actual malice’—that the statement was made with knowledge of its falsity or with reckless disregard of whether it was true or false.”
The question presented was:
“[W]hether this rule of liability, as applied to an action brought by a public official against critics of his official conduct, abridges the freedom of speech and of the press that is guaranteed by the First and Fourteenth Amendments.”
The opinion
Read the full rulingPDF · 1.54 MBPublished by the Library of Congress.
Oral argument
Listen at OyezOffsiteThe Court's own audio archive begins with the 2010 term, so this argument is held by Oyez rather than by supremecourt.gov.

