It is a huge obstacle for Sonia after a series of allegations from former ministers and employees PMO.Dnes Supreme Court declared that all mining rights granted in 1993 and 2010 were illegally allocated by the government in a process that lacked transparency in the absence of a competitive bidding system. 

The Supreme Court stated coal blocks that were allocated during the UPA period is full of corruption and lack of transparency in the allocation as well. Earlier this many accusations were made ​​at Sonia and Manmohan who are involved in such approval. Ex-PMO officer Sanjay Baru and other battered both in his autobiography. 

Verdict in coal block from the Supreme Court surprised many of his identified as the biggest scam in India economic history. CBI investigation is controlled by the Supreme Court in this case delivered its results with record time. It seems that now ll block, which are in working order will face obstacles to continue.