Because they voted to.
Washington also voted on it, but they turned it down pretty heavily.
Basically, when None of these Candidates wins, there is a re-vote where none of the listed candidates are eligible. I believe it once happened in a New York Republican congressional primary.
Are you sure about that Nighthawk? I'm fairly certain that in Nevada the candidate with the most votes still wins even if "none of the above" receives a majority.
I'm only passing along what I've heard. That seems totally pointless, if that's true. You're probably right...no wonder we voted it down!
Might be for constitutional reasons - can't have the main vote for Congress on a date different from the rest of the US, that sort of thing. Pretty damn pointless that way, though.