Defense Department officials told Newsweek that Deputy Secretary of Defense Patrick Shanahan would be "great" for the military industrial complex but was not a strategic thinker.
The president has a "great team" of national security advisers around him, Lindsey Graham said, adding that "he just needs to listen" to them.
"I've never registered for any political party," the defense secretary said after Trump called him "sort of a Democrat" on "60 Minutes."
The veteran investigative reporter warned he had "literally hundreds of hours of tapes."
The allegations included having her staffers pick up her laundry and drive her around on snow days.
"The Russian disinformation campaign has already begun," a Pentagon spokeswoman said.
But the technology probably won't be ready for another 10 to 15 years, arms experts say.
Defense Secretary James Mattis is heading to the White House to show President Donald Trump his options for attacking Syria.
The former Pentagon employee shared a video stating Obama was born in Kenya and another suggesting he was the Antichrist.
A top Russian general reportedly intervened to stop an attack from the U.S., preventing a repeat from last month in which many Russians were killed.
"As crazy as Trump may be, deep down he has trust in Mattis's judgment," says former Secretary of Defense Leon Panetta.
It is too soon to talk about details, including the location of Donald Trump's prospective parade, the Pentagon said.
The president has has said he wants to "try to top" France's Bastille Day parade.
Secretary of Defense James Mattis is traveling through Indonesia and Vietnam on a trip to help bolster U.S. influence in the region and woo several countries away from Russia and China.
The deadly incident occurred just a day after the Trump administration said terrorism would not be the country's top priority in terms of national security.
ISIS could be helped by a string of Turkish military strikes against Kurdish groups in northern Syria, U.S. Secretary of Defense James Mattis warned Tuesday.
Defense Secretary James Mattis said it is imperative the U.S. build a "more lethal force."
"Be at the top of your game," in case diplomacy with Kim Jong Un failed, was the U.S. defense secretary's Christmas message to soldiers.
He is the first Pentagon chief to visit the detention center since 2002.