Open thread: Facebook, sanity and anatomy

What's coming up on Sunday Kos ...

• Republicans manufacture a crisis for the Postal Service, and too many Democrats go along, by Laura Clawson
• A Guide to Reading Polls and Preserving Your Sanity, by Steve Singiser
• The Five Types of Political Friends on Facebook, by Georgia Logothetis
• A conversation with Prof Jack Balkin about "Living Originalism" and the constitutionality of the Affordable Care Act, by Armando
• Manning Marable wins posthumous Pulitzer for his biography of Malcolm X, by Denise Oliver Velez
• Anatomy of a middle class tax return, by Dante Atkins