57 States and 44 Presidents

Did anyone else catch the minor mistake in Obama's Inaugural speech? (hardly newsworthy, just curious)  Obama stated, "Forty-Four Americans have now taken the Presidential oath."  Sorry, only 43 folks (including Obama) have held the office of the president (and thus taken the oath).... count 'em (http://www.whitehouse.gov/about/presidents/) One would think his hotshot 27 (28?)- year old speech writer would have caught that (or at least one of his aides).