Left parties don't have any responsibility of keeping the congress government. BJP & Congress are their political rivals.
After last loksabha elections,it was a question of who will rule.. The left became the decision makers.. It is a question of choosing between the sea & the devil... And they selected the sea... And the left support Congress only to keep away BJP from power.
It is for national interest that they supported congress all these 4 years.....
Not present situation regarding N-deal came because of Manmohan Singh's committment to fulfil George Bush's demands.. It is not surprising as everyone know that Manmohan Singh is a man who always work as per USA instructions.The best example is the 1995 GATT & WTO agreements..
If the congress want to sacrifice it's government for American interests,let them do it...Why should the left care about them anymore?
Congress may be thinking that N deal is the biggest problem in India now.. They don't care about the inflation,rising prices,incresing poverty & unemployment..
Congress really lost the tradition of Nehru,who is more interested with common man's problems than white man's interests