WASHINGTON (CNN) - P.J. Crowley abruptly resigned Sunday as State Department spokesman over controversial comments he made about the Bradley Manning case.

Sources close to the matter the resignation, first reported by CNN, came under pressure from the White House, where officials were furious about his suggestion that the Obama administration is mistreating Manning, the Army private who is being held in solitary confinement in Quantico, Virginia, under suspicion that he leaked highly classified State Department cables to the website Wikileaks.

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