With just three weeks to go before voters head to the polls, President Obama and Mitt Romney both enter the second presidential debate on Tuesday night with vital missions: the incumbent needs to display the urgency that he lacked in the first debate, while the challenger is hoping to build on the momentum his campaign has seized over the past 10 days. With Super Bowl-sized audiences tuning in to the latest chapter in what’s become a weekly political mini-series, President Obama’s task is hard to difficult to overstate.
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