Denver, Colorado (CNN) - Call it the pre-debate battle of the diehards.
Just outside the debate security perimeter here at the University of Denver, hundreds of supporters of Republican nominee Mitt Romney are lined up on one side of University Avenue. On the other side of the street, hundreds of supporters of President Barack Obama.
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Both sides are waving signs and chanting.
Obama supporters are yelling "four more years."
Romney backers are countering with "four more months."