Hammer served as political aide to ambassador Phillip Goldberg in La Paz, Bolivia, from 2007 to September 2008, when Goldberg was expelled after a series of incidents suggested that the embassy was engaged in espionage and fomenting discontent against the government.
Back in Washington, Hammer was again detailed to the National Security Council, serving at the White House as special assistant to President Obama, senior director for press and communications, and NSC spokesman.
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