Notice how the average is closer to 60% Obama. Even precincts that are Democratic have averages that are less Democratic than that. Might be a mistake of entering the wrong numbers.
Ah ha, that is probably the best answer. The neighboring precincts do have about the same Democratic averages. Unless there was some bizarre McCain love there, maybe because he spent weekends there handing out free beer, it's probably just a data entry error. Damn! How boring.
But what about the high turnout? Maybe a digit transposition? Except even moving the order of the digits around to get the Pub and total vote down would not really do more than eliminate part of the anomaly.