With the cheers of his party still ringing in his ears, the US Democratic presidential nominee has hit the campaign trail with his running mate by his side. Barack Obama and Joe Biden have begun a tour of three crucial states as the race for the White House enters its final leg.

Obama lost no time in attacking his Republican rival over the economy and Iraq. “John McCain stands alone in his stubborn refusal to end a misguided war. That’s not the judgement we need. That won’t keep Americans safe. We need a president who can face the threats of the future, not keep grasping at the ideas of the past,” he said.

Obama and McCain have been running neck and neck in surveys but one poll of polls shows him edging ahead by a few points. That may be down to the euphoria at his party’s nomination convention. In any event there is still a lot to play for ahead of the election on November 4.

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