It's the longest such stretch in Pentagon history.
Shanahan said he has a great deal of discretion in deciding how to use the authorities granted to him by Trump's declaration Friday of a national emergency.
A U.S. official confirmed the withdrawal but declined to comment on specific plans or movements.
“After two years in the Pentagon, I’ve decided the time is right to return to the private sector."
His sycophancy stands in stark contrast to Jim Mattis' principled resignation.
The former commander of U.S. forces in Afghanistan appeared to quash rumors that he will succeed Jim Mattis as secretary of defense.
Mattis was forced out of his job early after his resignation letter angered President Donald Trump.
"To all you lads and lasses holding the line in 2018 on land, at sea or in the air, thanks for keeping the faith," he said.
“I was one of many senators who privately sat down with Gen. Mattis and said, 'Please stay,'" Durbin revealed on "Meet the Press."
Many bashed the retiring senator for letting Trump have his way far too often.
“Patrick has a long list of accomplishments," President Donald Trump tweeted Sunday. "He will be great!"
McGurk told colleagues he couldn't carry out president's orders in Syria and "maintain my integrity."
The former secretary of state said James Mattis' resignation is "a continuation of a crisis that too many people have been too content to live with."
The president hates the notion that he is sometimes in need of "adult daycare," said the CNN White House correspondent.
Smith slams the president's decision to withdraw troops from Syria "unprecedented in American history."
The "CNN Tonight" host also asked if there were "any adults left inside the Trump White House."
The Senate majority leader offered a rare public expression of disagreement with President Donald Trump.
Marco Rubio says the defense secretary's decision makes it clear the country is headed toward "a series of grave policy errors."