There are plenty of reasons this is the lowest point of Barack Obama’s presidency. He hasn’t fulfilled a major legislative campaign promise, his signature second-term immigration initiative is paralyzed, and the administration may never entirely recover from the unforced errors surrounding the Affordable Care Act’s rollout. But don’t blame these problems alone for Obama’s record-low 40 percent approval rating. In truth, his agenda went off the rails on a crisp December morning last year, when Adam Lanza strolled into Sandy Hook Elementary and killed 20 children and six adults. Obama hasn’t gotten back on track since.
The Connecticut massacre set in motion a cascade of events that led the White House to burn through its only real window to accomplish its goals. The month before the shooting, Obama had won a convincing reelection and a modest popular mandate. One major liberal wish-list entry, immigration reform, seemed not only within reach but almost inevitable.