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President Barack Obama’s seemingly hands-off management style is raising fresh questions and concerns that could upend his second-term legacy.

Claims by the administration and other Democrats that Obama didn’t know about sensitive matters in his own administration -- such as problems with the health care website and revelations of National Security Agency surveillance on foreign leaders -- have many in Washington scratching their heads.

“It all fits as part of a pattern. Who is in control? Who is running things? There are a lot of questions,” said Democratic pollster Peter Hart, who helps conduct the NBC News/Wall Street Journal poll, which Wednesday showed Obama’s approval rating dropping to an all-time low.