|
(CNN via WTTW)

Chuck Hagel served as the United States Secretary of Defense under the Obama administration from 2013 to 2015, after two terms as a Republican senator from Nebraska. Hagel is visiting Chicago to speak on national security and global geopolitics at the University of Chicago. 

|
A file photo of former U.S. Secretary of Defense Chuck Hagel (Photo Credit: U.S. Department of Defense)

Special counsel Robert Mueller says his team did not determine whether President Donald Trump committed a crime or not. Former U.S. Defense Secretary Chuck Hagel weighs in.