It is the credentials of India to keep the promise during the agreement with USA as a respected democratic country in the world. It does not matter who rules the country. If the Left have some priciple they should have withdrawn the support in the first place when the negotiations started. All parties rallying behind Left parties or BJP to tople the Govt. which will bring a bad name to India. Nothing is going to lose for UPA, they will fight the election and again they will come to power, but it affect our Indian economy and the inflation that we common people are going to face.