New Delhi: The AAP on Tuesday blamed Prime Minister Narendra Modi for the rejection by President Pranab Mukherjee of a bill for approving 21 MLAs as Parliamentary Secretaries in Delhi. "The central government is discriminating against our government in Delhi," Aam Aadmi Party leader Sanjay Singh told a press conference here. "The Modi government should not lie. It should reveal the truth on whose recommendation the bill was rejected by the President," he said. The remark came after Pranab Mukherjee reportedly rejected the Delhi government's bill to protect the post of Parliamentary Secretaries with retrospective effect. "President's rule anywhere in the country is imposed by the President on the recommendation of the central government," the AAP leader said. The AAP leader alleged that the central government was stalling the work of the Delhi government as it had not been able to digest its defeat in the 2015 Delhi assembly polls. Sanjay Singh said other states too had Parliamentary Secretaries but the Modi government was opposed to the idea only in Delhi.