Later Tuesday, Obama will meet with senators on Capitol Hill to discuss developments regarding Syria and also plans to make a nationally televised speech from the White House about the issue.
In the oil markets, investors will be monitoring fresh information on U.S. stockpiles of crude and refined products.
Data for the week ending Sept. 6 is expected to show draws of 2 million barrels in crude oil stocks and 1 million barrels in gasoline stocks, according to a survey of analysts by Platts, the energy information arm of McGraw-Hill Cos.
The American Petroleum Institute will release its report on oil stocks later Tuesday, while the report from the Energy Department's Energy Information Administration the market benchmark will be out on Wednesday.
Brent, the benchmark for international crudes, was down $1.50 to $112.22 per barrel on the ICE Futures exchange in London.
In other energy futures trading on Nymex:
Wholesale gasoline fell 2.87 cents to $2.7737 per gallon.
Natural gas lost 1.9 cents to $3.586 per 1,000 cubic feet.
Heating oil retreated 3.07 cents to $3.0876 per gallon.
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Pamela Sampson in Bangkok contributed to this report.