Congress leader P Chidambaram on Monday lashed out at the BJP-led NDA government at the Centre over the 'one nation, one election' issue, saying it is not possible under the present Constitution and requires at least five constitutional amendments. Replying to a question on reports that the BJP-led NDA government would implement 'one nation, one election' within its current tenure, he said Prime Minister Narendra Modi does not have the numbers to place those constitutional amendments either in the Lok Sabha or Rajya Sabha. In his Independence Day address last month, the prime minister made a strong pitch for 'one nation, one election', contending that frequent polls were creating hurdles in the country's progress. Addressing reporters here, Chidambaram said, "'One nation, one election' is not possible under the present Constitution. It requires at least five constitutional amendments." "Mr Modi does not have the majority to put those constitutional amendments in either in the Lok .