President Donald Trump is having a tough time hiring a Pentagon chief after the abrupt departure of Defense Secretary Jim Mattis late last month.
Jon Kyl, the retired Arizona Republican senator, became the second person to wave off Trump's overtures last week, telling the White House he is not interested in the job. Ret. Gen. Jack Keane also turned down the job shortly after Mattis' resignation. (Keane, who frequently advises Trump, had refused the position once before, during the 2016 presidential transition.)