A hacker breached TeleMessage, a government-approved messaging app used by Trump administration officials, exposing archived ...

In January, the head of the Pentagon, Pete Hegseth, decided to halt arms deliveries to Ukraine without President Trump ...

Pete Hegseth, the head of the Pentagon, decided to halt arms deliveries to Ukraine without the knowledge of the U.S.

Secretary Rubio’s new role as national security adviser may be unsustainable, according to foreign policy experts.

President Donald Trump was asked on NBC News' Meet the Press on Sunday if he would use military force to acquire Greenland. He said: "I don't rule it out, I don't say I'm going to do it, but I don't ...