Lawmakers and staff will work over the weekend in the hopes of reaching an agreement on a $1.15 trillion spending bill, after a week in which Democrats said they can't support several policy proposals Republicans are hoping to insert into the bill.

Democratic opposition is threatening to prevent Congress from passing the bill by Dec. 11, when full funding for the federal government will expire.

"Negotiations are ongoing and will continue over the weekend," House Appropriations Committee spokesperson Jennifer Hing told the Washington Examiner.

Republicans and Democrats exchanged offers and counteroffers over the last week, but couldn't reach a deal.

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