CNN has sued the Trump administration after the White House suspended the credentials of one of its senior journalists.
Its chief White House correspondent, Jim Acosta, had his press “hard pass” revoked last week hours after he got into a testy exchange with Mr Trump.
The network alleges this violates its and Acosta’s constitutional rights.
The lawsuit, filed in Washington DC on Tuesday, names the president and other senior aides as defendants.
Among those named are Chief of Staff John Kelly and White House Press Secretary Sarah Sanders, who cited unacceptable conduct as grounds for the revocation of Acosta’s pass.
On Tuesday Ms Sanders said in a statement that Acosta is one of nearly 50 hard pass holders at the CNN network.
“The White House cannot run an orderly and fair press conference when a reporter acts this way, which is neither appropriate nor professional,” the statement read.