Jaitley said: 'Jinnah was the principal architect of partition and this is the party's belief. So, the content of the book is against the party's ideology. Blaming Sardar Patel for partition is also against the party's belief. He played a crucial role in uniting the country.'

Jaitley, the party's leader in the Rajya Sabha, said Jaswant Singh's views on Muslims that they felt themselves aliens in the country were also contradictory to the core ideology and belief of the party.

Asked if disciplinary action could be taken against a party leader without issuing him a 'show cause' notice, Jaitley said: 'The parliamentary board (the party's highest decision making body) has a right to do it.'