"The violence is costing them (Government). It's putting them on the defensive now," said the niece of first Prime Minister Jawaharlal Nehru.
She was speaking at a panel discussion on 'No time for silence: why writers feel the need to speak up', organised as part of the ongoing Tata Literature Live literary festival here this evening.
After Sahgal, several other writers and creative personalities returned their respective awards to protest the "growing" tide of intolerance in the country under the present government.
"They don't have a majority in Rajya Sabha now but will have it in a couple of years. That will enable them to make some moves on amending the Constitution," Sahgal said.
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"Indira Gandhi needed two-third majority to amend the Constitution and that's what 1971 (post-Bangladesh war polls) gave her. So in the same way if they (Modi Government) get it, then they can proceed (to amend the Constitution)," she said.
BJP on its own has comfortable majority in Lok Sabha, but it lacks the same in Rajya Sabha, leading to key Bills getting stuck in the Upper House of Parliament.
"The country is anguished about what is happening to defenceless people who are being gunned down, who are having ink thrown on their faces, who are being brutally threatened," Sehgal had said at a panel discussion yesterday at the same festival.