San Francisco Mayor Ed Lee died in December of 2017; the election to replace him was Tuesday. No one knows who won. Partially that’s because the votes are still trickling in. Mail-in ballots merely had to be postmarked by election day, and as I write the city is reporting 87,000 votes yet to be processed. But that’s not the only roadblock. The other problem is math. See, the San Francisco mayoral election isn’t just another whoever-gets-the-most-votes-wins sort of deal.