Bihar opposition splits-up; how will the Nitish Kumar govt be challenged now?

In Delhi, differences between Trinamool Congress and Congress are becoming obvious day by day. On the other hand, Congress and RJD have split-up ways in Bihar. Where Congress is eying the support of Chirag Paswan, RJD is planning to walk the path of politics with LEFT. But the question is that how will such a divided opposition challenge the Nitish Kumar government?