TMC has no threat for next 3-4 years. Going by the present trends, BJP is expected to emerge as Principal opposition in Bengal after 2016 elections. TMC will sweep the elections with their solid base of  35 to.40 percent because of divided opposition. Left front will lose its opposition status to BJP,  with its ever deteriorating Vote share is expected to win 20 percent Votes only. LF's cadre en masse is jumping to BJP. In this situation, we might witness a keen  contest between TMC and BJP in 2021 elections,.

As per surveys presented by few channels TMC is going to form the government and Left front will get 100+ seats. BJP is predicted to get about 4 seats in West Bengal. Let us wait for the results. 2021 is far away

vijay wrote:

As per surveys presented by few channels TMC is going to form the government and Left front will get 100+ seats. BJP is predicted to get about 4 seats in West Bengal. Let us wait for the results. 2021 is far away

All in all, the truth is its not possible at present  for BJP to face TMC and win.

The media has gone quiet ob=ver the issue with a more interesting suicide case by a tv actress making it to the hot spot !..However, several arrests have been made so far, like I read somewhere a very apt statement , the Calcutta flyover collapsed under the weight of corruption, which is the actual fact. Both the politicians present and past and builders are to be blamed for the tragedy.

Accidents do happen where there is zero coruption due to design mistakes, errors of judgements, por execution etc. 

According to latest news, PM Narendra Modi, speaking at an election rally in Madarit north Bengal, said that the Flyover collapse signifies a Message from God illuminating the dangers of the All India Tranamool Congress led by the CM Mamata Banerjee. He further added, today the Flyover collapsed, tomorrow the state of Bengal will collapse, if the TMC continues to stay in power.

I must appreciate Modi's way to send the  message in a crisp and short way in such a way that it lands straight in to the Brains of the electorate of Bengal.

Modi he is the man who really got a strong and a sharp sense of political mind and he knew where to use the words.