Another excerpt that explains how it works there:
"In San Francisco, rather than just deciding a winner, voters are asked to rank candidates by preference. When the votes are tallied, if nobody gets more than 50 percent of the votes, the candidate with the least votes gets eliminated. Then the votes are tallied again, but for those who voted for the eliminated candidate, their second choice is now tallied instead. And so it goes, until one candidate claims a majority vote, not just the plurality.
While Breed got the plurality of the initial votes, Leno was a popular second and third choice for voters whose first choice candidate was eliminated. As of this morning, Leno has a bare majority of the vote, 50.4 percent to Breed's 49.6 percent. Leno picked up thousands more votes as candidates were eliminated than Breed. But with less than 1,500 votes separating the two of them and many more ballots to still tally, it may be days before we know for certain who actually wins."
Sounds like "one man, one vote" don't apply there no mo'.
I wonder if this is somehow in violation of the Voting Rights Act or certain Supreme Court decisions...?