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The U.S. and Russia are set to announce a nuclear arms treaty framework on Monday and President Dmitry Medvedev said he was "moderately optimistic" about the deal's progress. Obama and Prime Minister Vladmir Putin have a strained relationship, and Obama told the Associated Press last week that Putin has "one foot in the old ways of doing business." Nevertheless, arms control will be the main focus of the two-day summit and each side is expected to agree to own a decreased number of nuclear warheads and weapons launchers if the deal goes through.