"Singh's comments on Sonia ji is disgraceful and one that cannot be forgiven. This statement reflects the BJP leader's views on women. We will protest against BJP and its Central leadership in the House next week and demand Singh's resignation," Leader of Opposition in the House Radhakrishna Vikhe Patil, told PTI.
He said given the history of Singh in making controversial remarks in the recent past, he should be immediately sacked.
He added that by "insulting" Gandhi, he has insulted every woman who leads a public life.
"We are extremely hurt.. Prime Minister Narendra Modi should take moral responsibility for his minister's comment and sack him immediately," Vikhe Patil said.
Singh, a BJP MP from Nawada in Bihar, had on Wednesday stirred a hornet's nest with his comments asking whether Congress would have accepted Sonia Gandhi's leadership had she not been white-skinned.
The Nigerian High Commission demanded an apology over the remarks and took the matter to the ministry of external affairs, after which Singh was forced take back his comments.
