North Carolina DNC officials say they're worried whether they'll receive the $55 million in requested federal security funds for the convention.

Charlotte is to host the 2012 Democratic National Convention, with 35,000 delegates and visitors expected in the city.

"This is not just an American event," North Carolina Gov. Bev Perdue said in a report. "None of us want any kind of worry or threat. And so ... the more security we can find, both here and for the Republican National Convention (in Tampa), the better off the country is."

The Charlotte Observer said $4 million has been included as a placeholder in a House appropriations bill for security to cover local law enforcement for the convention. 

The Charlotte-Mecklenburg Police Department is expected to add to its force an estimated 2,400 to 3,400 officers from Hickory, Greensboro, Concord and Monroe, among other departments, for the event, the Observer said.