The 123 agreement on civilian nuclear cooperation between the United States and Russia was in trouble from the very beginning - the Bush administration got the timing wrong (here is an CRS report with a detailed analysis of the statutory requirements). Now the administration is saying that it is considering scrapping the agreement altogether. Which may be a good thing, in fact - this way Congress would not get a chance to pass a resolution of disapproval, which would complicate any future attempts to reintroduce the agreement.