Trying to convince the Left is a waste of time, they have to be just thrown out of the political system. They will never see the logic of the justifications of the Nuclear deal and will just bang their stubborn heads on the wall with their petty objections and will stupidly continue to oppose the deal. The very existence of the Leftists is Anti-US so by the root of their existence they will oppose any positive developments with the US, so it will be hard to sit at the table and humanely convince the left logically on the sound advantages of the Nuclear deal. By now the UPA government should have learnt its lesson of going into an alliance with the Left and learn not to make this mistake in the future.