Watchdog group American Oversight sued Trump officials after the shocking national security failure exposed by The Atlantic.

A judge is holding a hearing Thursday on the Trump administration's use of the Signal messaging app to discuss military strikes in Yemen earlier this month.

A federal judge on Thursday ordered key Trump administration agencies to preserve messages sent on Signal between March 11 to March 15.

District Judge James Boasberg — who has already incurred Trump’s wrath after ruling against the administration in a separate migration case — said he would order the government to “preserve all Signal ...

March 27 (UPI) --U.S. District Judge James Boasberg on Thursday ordered Trump administration officials to preserve their controversial Signal app chat that ... subject to the order by Boasberg ...

A federal judge in Washington ordered Trump administration officials Thursday to temporarily preserve records of a leaked Signal group chat.

WASHINGTON -- A federal judge has ordered the Trump administration to preserve the contents of the chat ... Signal that can be set to delete messages automatically -- prompting Judge Boasberg to ...