Capitol Hill is bracing for another potential showdown over the federal debt limit. On Monday, the Treasury Department warned the United States could run out of money to pay its bills unless Congress agrees to raise the $16.7 trillion limit on government borrowing. Republicans have again demanded spending cuts for the ceiling to be raised, but President Obama has said he would not negotiate on the debt limit another time. The Treasury says the federal government will be down to around $50 billion by mid-October, short of the amount needed to cover its obligations.