A federal judge on Monday slightly narrowed the classified documents case against former President Donald J. Trump, saying prosecutors cannot charge him based on an episode in which he is said to have shown a highly sensitive military map to a political adviser months after leaving office.
The decision by the judge, Aileen M. Cannon, was more of a swipe at prosecutors working for the special counsel, Jack Smith, who brought the case than a major blow to the allegations against Mr. Trump. Even though Judge Cannon technically removed the incident from the 53-page indictment, prosecutors may still be able to introduce evidence of it to the jury if the case finally goes to trial.
