Fair use is not a shield journalists can wield selectively. The same four-factor test that determines whether AI training on news articles constitutes infringement also determines whether a journalist can quote a source's work, whether a critic can reproduce a passage, whether a satirist can riff on a public figure's speech. A ruling that narrows fair use to shut down AI training would constrain every newsroom practice that depends on it — and the journalists who understand copyright law know this, which is why the labor campaigns have stayed focused…