Left parties are stooges (tattoos) of China. They are worried about India's proximity to USA and China is tacitly encouraging them to sabotage the deal. Only USA and India combindly can check the ever growing imperialistic designs of China. Let both the countries come together otherwise China will grab Arunachal P and Sikkim and Indian Marxists will celebrate the Chinese victory in their own way. Leftists are curse for India and need to be checked by the people themselves otherwise it would be too late to mend.