New Delhi, Aug 23 - Sudheendra Kulkarni, a key aide to senior Bharatiya Janata Party (BJP) leader L.K. Advani and also to former prime minister Atal Bihari Vajpayee, has snapped his ties with the party over 'major ideological differences'.

'I have major ideological differences with the party. I want to be honest in my views and wish to maintain party discipline. So I decided to come out,' said Kulkarni, who wrote a magazine article criticising the BJP and its ideological fountainhead Rashtriya Swayamsevak Sangh (RSS) after the party's poll debacle.

He, however, maintained that his decision to quit the BJP had nothing to do with the expulsion of Jaswant Singh over his book 'Jinnah: India, Partition, Independence'.

'I decided to end my association with the BJP several weeks back. I had conveyed this to Advani-ji also. My decision has nothing to do with the unfortunate incident of Jaswant Singh-ji,' Kulkarni told television channels.

Kulkarni denied that the BJP was slipping into oblivion. 'It is a very strong, a very resilient party...it will go from strength to strength,' said Kulkarni, a one-time Communist Party of India-Marxist card holder.

He said he would continue to be a well-wisher of the party and added: 'I have the highest regard for Advani-ji and Atal Bihari Vajpayee-ji, with whom I have worked for 13 years.'

Kulkarni worked in the Prime Minister's Office (PMO) during Vajpayee's time and served as his speech writer, media adviser and political aide.