This one's a project, but if you have time, David Koon recommends following this link
to a video from the Daily Kos bloggers' conference. At about the 40-minute mark in a panel discussion comes the point: a man in uniform supports the surge in Iraq and gets rebuked. Retired Gen. Wesley Clark steps
in and delivers what David describes as an "elegant argument" about why people in uniform should not engage in political debate.