The Washington state headquarters for the president's re-election campaign was broken into last night, and police are investigating the theft of three computers from the Bellevue office. Missing are the computers used by the campaign's executive director, the head of the get-out-the-vote effort and one that had been set for delivery to the campaign's Southwest Washington field director, said Jon Seaton, executive director of the state's George W. Bush campaign. Seaton said data on the computers was backed up and available elsewhere. But, he said, the loss creates a potential security breach about the campaign's so-called 72-hour plan, the Bush...