A U.S. carbon-capping bill aimed at curbing climate change has died in the Senate but its supporters looked to the next president to enact a global warming law as early as 2009.

The bill aimed to cut total U.S. global warming emissions by 66 percent by 2050. Opponents said it would cost jobs and raise fuel prices in an already pinched American economy.

Far from being discouraged, Sen. Joe Lieberman said international observers would be gratified that the measure got support from a majority in the Senate, including presumptive presidential nominees John McCain and Barack Obama.

The vote showed 48 senators favored the bill with 36 opposed. Six more senators, including Illinois Democrat Obama and Arizona Republican McCain, wrote letters saying they would have voted in favor if they had been in town to vote. Sixty votes were needed to take the bill to the next stage of consideration.

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