Should Politics.SE also implement this feature when we get a design? If so, please suggest which icon(s) we could use for this purpose.
If we're going to go this route, I would suggest a check inside the box. Something similar to this Font Awesome icon
- It's a neutral symbol
- It reminds us of voting (inherently political)
- It's easy to do
I finally got a chance to make the flag icons I mentioned in my comment on CDJB's answer. I used this free icon as the template.
Flags are one of (if not the) primary symbols for a country, so they're inherently political.
I'm not sure this is any better or worse than the checkmark, it just has a different slant. Flags lean more towards external politics, of and between nations, while checkmarks would be more suggestive of internal politics, between a government and its citizens.