"Mr. Obama lacks something more damaging to an incumbent—a sense of presidential responsibility."

http://online.wsj.com/article/SB10000872396390444734804578062820162407596.html?mod=WSJ_Opinion_LEADTop

"Staring back, the president clutched for a second. He looked like a fourth-grader being confronted in front of the whole class by Miss Crowley of all our childhood nightmares. That moment revealed the problem: At the core of Barack Obama's persona and his presidency is a constant instinct to deniability."