By Sunday morning, Senate negotiators had yet to resolve the two key tax issues at issue in a potential "fiscal cliff" deal -- how many wealthy households should face higher income taxes in the new year and how to tax inherited estates.

 Even the extension of unemployment benefits for 2 million people was still up in the air, according to people close to the talks in both parties. Meanwhile, the White House was continuing to resist a Republican push to let automatic spending cuts begin slicing agency budgets next month.

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