Hillary Supporter The AP's Dean Singleton is responsible for this-Called Osama "Obama"

http://www.huffingtonpost.com/2009/04/16/10-most-offensive-tea-par_n_187554.html

Sen. Barack Obama quickly corrected a slipup about his name Monday at the Associated Press' annual luncheon in Washington, DC.

Dean Singleton, board chair of the Associated Press and a longtime newspaper executive, asked Obama about the possibility of shifting troops into Afghanistan to fight against the al Qaeda leader, calling him "Obama bin Laden," he said.

http://www.huffingtonpost.com/2008/04/14/ap-chief-asks-barack-abou_n_96607.html