A federal judge in New York on Monday ruled against President Donald Trump and the Justice Department over the firing of Maurene Comey , daughter of former FBI Director James Comey, from the Manhattan U.S. attorney's office.

Judge Jesse Furman said Comey's termination violated civil service rules.

"Yes, the Attorney General is authorized by law to remove an AUSA. But the Attorney General (and anyone to whom the Attorney General delegates that authority) is also limited by law, namely the CSRA, to do so only in a particular manner and only for certain reasons," the judge wrote.

Furman ordered Maurene Comey, who most recently led the prosecution of Sean "Diddy" Combs , reinstated with back pay.

In addition to calling her termination unlawful, Furman decided Trump and the DOJ violated the separation of powers, the Administrative Procedure Act and Maurene Comey's due process rights.

"The Department disagrees with this decision and will appeal in due course," a DOJ spokesperson told ABC News.

A spokesperson…