"BJP national executive supported the implementation of GST. They should talk to traders & businessmen in their own party," he said in a tweet.
Chidambaram also said the BJP national executive's support to demonetisation is "utter contempt of public opinion".
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It claimed the NDA government had "delivered" on its promise of corruption and black money, adding that demonetisation, a move which invited sharp criticism from the opposition, "broke the backbone of the black market as well as the black money hoarders".