Democrats ended their convention in Charlotte $5 million short of their budget even after being forced to draw down a $10 million line of credit from Duke Energy Corp. (DUK), according to a Democratic Party fundraiser.

That will leave a $15 million bill that eventually will have to be paid by President Barack Obama’s campaign or the Democratic National Committee, according to the fundraiser, who spoke on condition of anonymity to discuss internal deliberations.

The Charlotte Host Committee ended the convention with more than $5 million in immediate obligations and may require a direct cash infusion from the Obama campaign to pay vendors, said the fundraiser.