1. Blogging on Iran, Jon Snow  says that Ayatollah Khamenei's position is "increasingly fragile" and that if he falls the Islamic revolution itself may unravel.
3. Liberal Conspiracy's Sunny Hundal  names the top left-wing campaign groups of the year, including Compass, Hope Not Hate and 38 Degrees.
4. Over at LabourList , the Labour MP Tom Harris warns that the Tories continue to despise investment in public services.
5. Luke Akehurst  explores the political significance of Labour's apparent resurgence in the north. The north-west and Yorkshire are full of marginal seats, he points out.