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Pablo Martinez Monsivais, Associated Press
President Barack Obama walks toward the original manuscript of the 'Star Spangled Banner' during his tour of Fort McHenry Visitor and Education Center in Baltimore, Friday, Sept. 12, 2014. With Obama are Vincent Vaise, left, National Parks Service Ranger and Chief of Interpretation at Ft McHenry and Burt Kummerow, CEO of Maryland Historical Society. Obama traveled to the historic site that is celebrating the 200th anniversary of the Battle of Baltimore and will also attend a private Democratic fundraiser before returning to Washington.

BALTIMORE — President Barack Obama is touring the birthplace of the Star-Spangled Banner, where U.S. troops defended the city of Baltimore against the British during the War of 1812.

Fort McHenry sits off the Chesapeake Bay. Obama's visit marks the 200th anniversary of the Battle of Baltimore.

Joined by both of Maryland's senators, Obama examined the original manuscript bearing the lyrics to the national anthem that Francis Scott Key wrote at the fort. His tour guide says if the Declaration of Independence was the nation's birth certificate, then the Star-Spangled Banner is its high school diploma.

Obama's quick stop at Fort McHenry comes as the president visits Baltimore to raise money for Senate Democrats. Donors are paying between $10,000 and $32,400 to hear Obama speak and answer questions at a private home.