"The zeal in the Trump administration’s efforts to hunt leakers led to the extraordinary step of subpoenaing communications metadata from members of Congress — a nearly unheard-of move outside of corruption investigations. While Justice Department leak investigations are routine, current and former congressional officials familiar with the inquiry said they could not recall an instance in which the records of lawmakers had been seized as part of one."
https://www.nytimes.com/2021/06/10/us/politics/justice-department-leaks-trump-administration.html
https://www.nytimes.com/2021/06/10/us/politics/justice-department-leaks-trump-administration.html