It's enough to give the National Enquirer an insecurity complex. They pay people to come up with ludicrous accusations of celebrity misbehavior only to reveal after one's purchased the rag that it was all a big deal over nothing. But here we actually have the reality living up to the accusations. I know what the Enquirer staff is saying, "Arrrrrrrrrgh! How could we have missed this?!" The FBI is making a new push to determine how a woman who had an affair with retired Gen. David H. Petraeus when he was CIA director obtained classified files, part of an expanding series of investigations in a scandal that also threatens the career of the United States? top military commander in Afghanistan. Senior law enforcement officials said that a late-night seizure on Monday of boxes of material from the North Carolina home of Paula Broadwell, a Petraeus biographer whose affair with him led to his resignation last week, marks a renewed focus by investigators on sensitive material found in her possession. ?The issue of national security is still on the table,? one U.S. law enforcement official said. Both Petraeus and Broadwell have denied to investigators that he was the source of any classified information, officials said. The surprise move by the FBI follows assertions by U.S. officials that the investigation had turned up no evidence of a security breach ? a factor that was cited as a reason the Justice Department did not notify the White House before last week that the