President Obama likes to be alone.

When he speaks at rallies, he doesn’t want the stage cluttered with other officeholders. When he rides in his limo, he isn’t prone to give local pols a lift. He wants to feel that he doesn’t owe his ascension to anyone else — not a rich daddy, not a spouse or father who was president, not even those who helped at pivotal moments. He believes he could do any job in his White House or campaign, from speechwriter to policy director, better than those holding the jobs.

So Obama knows that he alone is responsible for his unfathomable retreat into his own head while 70 million people watched. He hadn’t been nailing it in debate prep either, taking a break to visit the Hoover Dam, and worried aides knew his head wasn’t in it. When the president realized what a dud he was, he apologized to flummoxed and irritated advisers.

Once during the 2008 campaign, reading about all the cataclysms jolting the economy and the world, Obama joked to an adviser: “Maybe I should throw the game.” This time, he actually threw the game. And shaved points right off his poll ratings. The president is good at analyzing the psychology of other world leaders, and he wrote an acclaimed memoir about his long, lonely odyssey of self-discovery. But he doesn’t always do a good job at analyzing his own psychology to avoid self-destructive patterns.

David Maraniss, who wrote biographies of Bill Clinton and Obama, said that both men had recurring themes. Clinton would plant “the seeds of his own undoing” and then “find a way to recover.” Obama’s personality, Maraniss said, was shaped by his desire to avoid traps created by his unusual family and geographical backgrounds, and the trap of race in America.