This was a big deal when some guy showed up in uniform and asked
questions of General Clark at YearlyKos one year.
Did McDonnell or Steele encourage these folks to wear their uniforms in the audience for the cameras at a political event. Respect your fellow citizens serving in the armed services much?
Here are what I think are the relevant sections from
DOD Directive 1344.1,
3.1 The wearing of the uniform by members of the Armed
Forces (including retired members and members of
Reserve components) is prohibited under any of the
3.1.2 During or in connection with furthering
political activities, private employment or commercial
interests, when an inference of official sponsorship
for the activity or interest may be drawn.
And this article titled WEARING UNIFORMS PROHIBITED AT POLITICAL EVENTS, PROTESTS.
The secretary of defense prohibits all military
personnel, including National Guard and reserve forces
from wearing military uniforms at political campaign
or election events," according to DoD Instruction
2nd money quote:
Then the next thing you know, there’s a picture of
service members sitting under a [political] sign.
These are the kinds of things we would like to avoid.