Democratic presidential candidate Barack Obama has been campaigning in Charlotte.
The Illinois senator held a rally downtown Sunday.
It's his third trip to the state since winning his party's primary in May.
Obama's wife, Michelle, and vice presidential pick, Joe Biden, also have made stops in Charlotte in the past week.
Both Obama and Republican rival John McCain have been focused heavily on the state as the polls show a tightening race.
McCain's campaign said Saturday it is increasing staff levels in North Carolina.
The state hasn't voted for a Democrat for president since Jimmy Carter in 1976.
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