Reporters from roughly 30 television networks, newspapers, magazines, and web sites celebrated the Fourth of July with Barack Obama at the White House last weekend. Why didn't you know that? Because they were sworn to secrecy. We reported yesterday that Politico's Mike Allen was spotted milling about as a guest at the White House's "backyard bash" by the pool reporter, who was allowed into the event for 40 minutes and kept in a pen before being ushered out. When Allen quoted from the pool report in his Playbook column the next day, he deleted a reference to his own name...