January 20th.
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Michelle Obama
Traditionally, the Chief Justice of the United States administers the Oath of Office to the president-elect. For Barack Obama's inauguration, Chief Justice John Roberts administered the oath of office to the president-elect, Barack Obama.
The oath of office is administered by the chief justice, usually at the inauguration ceremony in Washington DC.
January 20, 2009
Chief Justice of the Supreme Court John Roberts
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The Oath of Office was administered by the Chief Justice of the United States, John G. Roberts.
The ceremony begins at 10:30 CST, so President Obama will be sworn in at approximately 11:00 A.M. CST.
The Oath of Office for the President of the United States is traditionally given on the steps of the US Capitol Building in Washington DC.
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Chief Justice John Roberts gave the oath to President Barack Obama.