The incident has been condemned as one of the most "stunning and dangerous" breaches of military intelligence ever seen.

Per executive memorandum of the President, the protective detail for former Homeland Security Secretary Alejandro Mayorkas ...

Trump and his allies repeatedly went after Hillary Clinton for not using proper government channels to send messages ...

Top national security officials for President Donald Trump, including his defense secretary, texted war plans for upcoming ...

The chat "appears to be an authentic message chain, and we are reviewing how an inadvertent number was added to the chain," ...

Rep. Gregory Meeks (D-N.Y.), the ranking member of the House Foreign Affairs Committee, on Monday railed against the Trump ...

U.S. national-security leaders included me in a group chat about upcoming military strikes in Yemen. I didn’t think it could ...

Construction crews are filling seven “vulnerable gaps” in the border wall system, according to Customs and Border Protection.

The Signal messages show the inner workings of the president's team and how his Vice-President JD Vance disagreed with him.

The senior adviser with the West Wing office closest to the action — the Oval Office — in President Trump’s second term is ...

The top federal law enforcement position in northern Illinois has been vacant for two years, but NBC 5 Investigates has been ...