"There are a fair number of USAns -- and others -- who are wondering whether ...

[xoxoxoBruce]

Originally Posted by jinx

Can you tell me more about this? Who are these challengers and what rights do they have? I'm not in the habit of being particularly friendly or forthcoming to strangers who approach me, but I don't want to screw myself out of the chance to vote by telling the wrong person to piss off.

I would challenge their right to question you. If they can't produce valid credentials, shoot 'em.
btw- You can vote until you're convicted.