Obama, Congress set for one last effort on 'fiscal cliff'

WASHINGTON/HONOLULU, Dec 26 (Reuters) - President Barack

Obama is due back in Washington early Thursday for a final

effort to negotiate a deal with Congress to avert or at least

postpone the "fiscal cliff" of tax increases and government

spending cuts set to begin next week.

No specific bill dealing with the cliff was on the schedule

of either the U.S. Senate or House of Representatives, which are

expected to return on Thursday after the holiday break.

Investors are closely watching the talks, concerned that going

over the cliff could throw the economy into recession.

Aides and members of Congress have said that a modest,

last-minute measure to avoid the spending cuts and most of the

tax hikes could pass the Democratic-controlled Senate if

Republicans agree not use a procedural roadblock known as a

filibuster, a commitment that Senate Republican leader Mitch

McConnell has so far not made.

But to win approval in the Republican-controlled House of

any bill that raises taxes on anyone, a rare bipartisan vote

would be required. All 191 Democrats would have to team with up

with at least 26 Republicans to get a majority if the bill

included tax hikes on the wealthiest Americans, as Obama is

demanding.

Some of those votes could conceivably come from among the 34

Republican members who are either retiring or were defeated in

the November elections and no longer have to worry about the

political fallout.

In the alternative, Congress could let income taxes go up on

everyone as now scheduled and then during the first week of

January, scramble and get a quick deal to cut them back except

for the highest brackets, along with a measure putting off the

$109 billion in automatic spending cuts that most lawmakers want

to avoid.

Once the clock ticks past midnight on Dec. 31, no member of

Congress would have to vote for a tax increase on anyone - taxes

would have risen automatically - and the only votes would be to

decrease tax rates for most Americans back to their 2012 levels.

Obama and congressional lawmakers left Washington on Friday

for the Christmas holiday with talks to avert the fiscal cliff

in limbo.

Obama is expected to turn to a trusted Democratic ally,

Senate Majority Leader Harry Reid, to help craft a quick deal.

White House aides began discussing details of the year-end

budget measure with Senate Democratic counterparts early this

week, a senior administration official said on Monday