Would the Department of Defense react poorly to volunteer experience with the Obama campaign? [PLUS: How are we affected by political-affiliation discrimination?]?

I am currently applying for a research grant from the Department of Defense. One of the sections asks me to write about my Current and Recent Volunteer Contributions. I have two: my animal rescue organization and the Obama campaign.

I’m assuming that the folks at the DoD aren’t the most liberal bunch. While they certainly aren’t supposed to discriminate based on political leanings, I worry that talking about the Obama campaign may leave a bad taste in the reviewers’ mouths. Because this is a very competitive grant, and the decisions are at least somewhat subjective, should I leave out Obama and focus only on my animal-rescue work? Or am I totally off the mark in this thinking, and more volunteer experience is better?

In any event, I think this opens up a broad and more interesting question:
How are we affected by political-affiliation discrimination?

Feel free to answer either or both.