Why is US so particular about signing the nuclear deal?? Remember they were so interested in forcing India to accept the PL480 wheat during the 1960s famine in Inida. With that they introduced the Parthenium weed into India. They also forced India into chemical farming which paved the way for them to create a huge fertilizer market in India. In the recent past it was the WTO and now the Nuclear Deal. What we should realize is that they do things only if it is going to create billion dollar business opportunities for them.
Maybe it is better the PM quits, then lot of skeletons will start falling, and everybody will get to see the US Bluff.
Remember, in Iraq US made sure exclusive no bid oil contracts were signed only with the American companies. They had kept China and India out of the bidding process itself. Definitely they have something sinister planned.