Here’s what the Loop is reading this morning:

Bo Obama is earning his keep on the trail. (Pablo Martinez Monsivais/AP)

It’s no “Hunger Games” — Clear some space on your bookshelf, nerds--better make that a lot of space. Historian Robert Caro’s latest installment (the fourth in an expected five-part collection) of the Lyndon Baines Johnson biography is out this week. “The Passage of Power” weighs in at more than 700 pages, our colleague Maura Judkis reports.

Bin there, done that — All the ado about the death of Osama bin Laden--would Jimmy Carter have done it? Is President Obama politicizing it?--might not matter come November, says our colleague Felicia Sonmez. It’s still all about the economy, stupid, she says.