Scott Horsley

Ben Franklin famously observed that nothing is certain but death and taxes.

So far, Congress hasn't repealed the former, but the future of estate taxes — a largely overlooked piece of the "fiscal cliff" — remains uncertain as this year draws to a close.

Until now, most of the year-end tax debate has focused on the income tax, but another battle could be brewing over estate taxes.

As leaders in Washington try to make a deal to avoid the automatic tax hikes and spending cuts slated to go into effect in the new year, one major focus of the negotiations is whether to let taxes go up on the rich.

The Obama administration wants to allow the Bush-era tax cuts to expire for top earners. House Speaker John Boehner and congressional Republicans have countered with a proposal that they say would raise revenue through ending loopholes and deductions in the tax code and would not increase tax rates.

Treasury Secretary Timothy Geithner says it's up to congressional Republicans to take the next step in budget talks to avoid the pending automatic spending cuts and tax increases at the end of the year.

Appearing on the Sunday talk shows, Geithner said there's "no path to an agreement" until Republicans are willing to accept higher tax rates on the rich.

President Obama is hoping the same campaign tools that helped him win re-election will also deliver a policy win in the fight over federal taxes.

The president wants Congress to extend Bush-era tax cuts for most Americans, while allowing taxes to go up for the wealthiest 2 percent. His aides are using email, social media and beyond-the-Beltway campaign appearances in hopes of putting pressure on Republican lawmakers.

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RENEE MONTAGNE, HOST:

This is MORNING EDITION from NPR News. I'm Renee Montagne.

LINDA WERTHEIMER, HOST:

And I'm Linda Wertheimer in for Steve Inskeep.

After attending the annual summit of Southeast Asian leaders, President Obama is winging his way home this morning. And tomorrow, he'll issue the traditional Thanksgiving turkey pardon. Then after the holiday it's back to budget talks with congressional leaders deciding what else might be spared, and what government programs or tax breaks might feel the knife.