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As a result, the discussions were focused on the economy and expanding trade and commerce.

The U.S. and Russian presidents said they had resolved most of the obstacles in the path of Russia’s entry into the WTO. They have instructed their negotiators to work as quickly as possible to wrap up what Mr. Obama said were “difficult issues” that will require “some significant work,” but Mr. Medvedev described as “minor problems.”

“A lot of the technical issues, the resolution of those technical issues … may be in the hands of the Russian government,” Mr. Obama said.

There “may be certain international standards that require modifications in Russian law,” he said. “We are going to do everything we can to get this done as quickly as possible.”

Mr. Medvedev said the negotiators had been instructed to work as fast as possible, and added that he hoped negotiations would be wrapped up by the end of September.

Russia belongs in the WTO … that’s good for Russia, it’s good for America and it’s good for the world economy,” Mr. Obama said.

Speaking later at the Chamber of Commerce, Mr. Medvedev said his administration is “convinced that the U.S.-Russia economic potential is great.”

Russia has agreed to buy 50 Boeing 737 aircraft worth $4 billion that Mr. Obama said would add up to 44,000 new jobs in the U.S.

The two leaders also discussed recent international developments including the fresh round of U.N. sanctions on Iran, tension on the Korean Peninsula and unrest in Kyrgyzstan.