The Trump administration is throwing its weight behind OpenAI in a copyright lawsuit brought by The New York Times accusing the tech company of mass theft for using the publication’s content to train its AI system. In a brief backing OpenAI filed in New York federal court on Tuesday, the Justice Department argues that training on copyrighted material constitutes fair use, the legal doctrine in intellectual property law that allows creators to build upon copyrighted works without a license. The motion appears to be the first time the government has weighed in on novel issues raised by the tech that could have far-reaching implications on…