Left-leaning Californians say they would rather leave America than stay with George W Bush as president. "Do you think Great Britain would give us political asylum?" the woman in Starbucks asked. "It's just . . . I don't think I can stay if Bush wins again." In the heavily Democratic state of California, it has become an increasingly familiar refrain. At first, the threat was little more than a joke. Now, on the eve of one of the most polarised elections in recent history, some say they really do intend to leave should "the worst" occur. There seems little doubt...