On Saturday, President Obama spoke at a campaign rally in Wisconsin. As I noted on Sunday, contradicting a local Milwaukee Sentinel crowd size estimate of 5,000, Politico, the Wall Street Journal, and the Associated Press reported that 18,000 were on hand, with the AP further claiming that the event was "the largest yet of Obama's reelection campaign."

Charles Spiering at the Washington Examiner believes he has learned why the national press reported that the crowd was 18,000. It's because Milwaukee Mayor Tom Barrett told them it was, and the press's pool reporter took his word for it: