Former Republican National Committee Chairman Michael Steele is the latest to join the expanding bloc of high-profile GOP figures endorsing the Democratic nominee.
"They should show some courage and step forward as well," Obama-era Defense Secretary Chuck Hagel said.
Hagel explained that insufficient climate change data is "a real and present threat to our national security," citing the danger abnormal storms pose to the military.
Former Defense Secretary Chuck Hagel said the U.S. military "can't fix the problems in Afghanistan" and Russia "really holds the cards" in Syria.
The Trump administration has maintained it will not tolerate a nuclear North Korea.
New data and directives presented by outgoing Secretary of Defense Chuck Hagel draw a lukewarm response.
Ashton Carter is a former deputy secretary at the Department of Defense.
A New York Times report said Obama had authorized future combat in Afghanistan, but Obama reiterated that U.S. combat there "ends next month"
The New York Times described Hagel's resignation as the "first cabinet-level casualty" of the end of the Democratic majority in the Senate.
With John McCain set to take over Senate Armed Services Committee, the Hill is going to need a lot more flak jackets.
Climate change, the Pentagon writes, requires immediate action on the part of the U.S. Military
Chuck Hagel wants to shrink our armed forces, setting off a fight that will above all divide Republicans