“Duty: Memoirs of a Secretary at War”

Former Secretary of Defense Robert Gates signs copies of his new book, 'Duty' during an event sponsored by Politico at the Mayflower Renaissance Hotel on Jan. 16, 2014 in Washington, D.C. (credit: Chip Somodevilla/Getty Images)

Gates: ‘I Don’t Have Any Bitterness At All’

Former Defense Secretary Robert Gates took the tour of his tell-all book Tuesday to Texas A&M University, where he formerly served as president, telling a crowd of 2,000 people that he was hamstrung by a dysfunctional and polarized Washington too intent on micromanaging and getting re-elected.