From the New York Times:
As the Justice Department investigated who was behind leaks of classified information early in the Trump administration, it took a highly unusual step: Prosecutors subpoenaed Apple for data from the accounts of at least two Democrats on the House Intelligence Committee, aides and family members. One was a minor.
Prosecutors, under the beleaguered attorney general, Jeff Sessions, were hunting for the sources behind news media reports about contacts between Trump associates and Russia. Ultimately, the data and other evidence did not tie the committee to the leaks, and investigators debated whether they had hit a dead end and some even discussed closing the inquiry.
But William P. Barr revived languishing leak investigations after he became attorney general a year later. He moved a trusted prosecutor from New Jersey with little relevant experience to the main Justice Department to work on the Schiff-related case and about a half-dozen others, according to three people with knowledge of his work who did not want to be identified discussing federal investigations.
During an interview with MSNBC’s Rachel Maddow, Rep. Schiff denounced the “politicization” of government under the Former Guy and called for an inquiry into what he said amounted to a “terrible abuse of power.”
“It violates, I think, the separation of powers, but it also makes the Department of Justice a fully owned subsidiary of the president’s personal legal interests.”
In a separate statement, Schiff said: “President Trump repeatedly and flagrantly demanded that the Department of Justice carry out his political will, and tried to use the Department as a cudgel against his political opponents and members of the media. It is increasingly apparent that those demands did not fall on deaf ears. The politicization of the Department and the attacks on the rule of law are among the most dangerous assaults on our democracy carried out by the former President.”