Happy Birthday to Laurel Holloman, 42.
Right to the good stuff:
1. Seth Masket has a quick note on quality challengers.
2. Jonathan Chait on Josh Barro...and on climate, the DC Circuit, and filibusters.
3. Sarah Kliff on the fluoridation wars, before Portland clobbered a fluoride vote.
4. And Kevin Collins tweets something very sensible: "Presidential elections are the least common type of contest, so be wary of general conclusions about US electoral politics drawn from them."