An Arizona appeals court on Wednesday upheld a jury’s $600,000 judgment in favor of a rancher in a defamation lawsuit, rejecting an environmental group’s argument that documents it posted on the Internet were shielded by the First Amendment. The Court of Appeals upheld a Pima County Superior Court jury’s award of compensatory and punitive damages to Jim Chilton in his lawsuit against the Center for Biological Diversity, a nonprofit with offices in Arizona, California, New Mexico, Oregon and Washington, D.C. A lawyer for the rancher said the appellate court had stood up for a person wrongly defamed, while an attorney...