Acknowledging that uncertainty existed over the nuclear deal between India and the United States, Prime Minister Manmohan Singh [Images] on Monday said that India would have to watch what happens when the US Congress takes up the deal in November.

Answering a question over the delay in the vote on the deal in the US Congress, Singh said he had always maintained that India wanted a deal within the July 2005 and March 2006 statements signed by him and President George W Bush [Images].

"But one has to reckon with the fact that we have no control over the legislative process in the US, (and) that uncertainty will always exist. There is nothing that I can do to get over the uncertainty," he said on board his special aircraft while returning from Johannesburg to New Delhi.