President-elect Donald Trump’s draft executive order that would allow him to purge military leaders stunned a retired Air Force colonel, who sounded the alarm during an interview Tuesday on the devastating effects the action could have on the U.S. military. “It is stunning,” retired Col. Cedric Leighton told CNN’s Wolf Blitzer during an appearance on his show, “The Situation Room.” Leighton, a CNN military analyst, began his remarks after Blitzer noted that the draft order coming out of Trump’s presidential transition team “is raising fresh concerns about the politicization of the U.S. militar…