Supervisor Chris Daly's seat in District 6 is open this November, and both moderates and progressives consider it a key swing district. That's why, a veteran local politico told me several months ago, it would be approached with a careful game plan, a thoughtful slate of candidates, and a narrow, well-focused field.So much for that.With a little more than nine months to go, we've got candidates coming out of the flower planters on Market Street. If anyone else enters, we may have one candidate for each of the roughly 8,000 votes it will take to win.For the progressives, the original...