For Kerry, the public showdown with Pickens represents not only a belated engagement with old antagonists, but also an early strike against a Democratic primary opponent who signaled Monday that he welcomes the scrutiny of Kerry's military record initiated by the Swift Boat ad campaign in 2004. "It goes to his credibility," said Ed O'Reilly, a Gloucester lawyer mounting a challenge to Kerry in the Democratic primary. "It needs to be cleared up." [snip] As it stands, the man most welcoming of the return to the conflicts of 2004 is O'Reilly, who is attacking Kerry as not opposing the Iraq...