Candidates hit the campaign trail

President Obama, Republican presidential candidate Mitt Romney and his running mate Paul Ryan hit the stumps on Monday.

President Obama sits in the back of his limousine after arriving at San Francisco International Airport outside San Francisco on Monday, Oct. 8, 2012. The president was spending the night in San Francisco campaigning and fundraising. (AP Photo/Eric Risberg)

President Obama sits in the back of his limousine after arriving at San Francisco International Airport outside San Francisco on Monday, Oct. 8, 2012. The president was spending the night in San Francisco campaigning and fundraising. (AP Photo/Eric Risberg)

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