The U.S. Justice Department says it is investigating several television networks over whether they broke federal competition laws after they temporarily suspended the shared White House press pool coverage of former President Donald Trump.

Last month, ABC, CBS, CNN, NBC and Fox News all halted their pool broadcasts for a brief period in protest of a temporary ban imposed by the Trump administration on reporters from CNN, MS NOW and Politico. The ban was later lifted by a judge after the outlets sued, arguing that it violated their First Amendment rights.

The DoJ’s Antitrust Division has requested internal communications from the five networks to determine whether the collective boycott could constitute a violation of the Sherman Act, which prohibits monopolistic business practices. Central to the inquiry is whether the networks coordinated to restrict competitive coverage, a behavior that could be interpreted as a form of anti‑competitive restraint.

Blooming corporate entities normally share material from the press pool with the broader media, a tradition that dates back more than a century. The networks have not yet commented on the investigation. The White House had reported that it removed credentials after the outlets were accused of publishing “fiction or lies” about the president’s team, but a court ruling reinstated their access.

The Trump administration has a history of taking legal action against media outlets, including lawsuits over coverage of the president. In February, the White House announced it was taking control of the press pool, which had historically been managed by the White House Correspondents’ Association. The administration also barred Associated Press reporters from certain spaces over concerns about terminology, a case that remains on the docket.