Lekhi had a special charm for fighting the establishment, and was a well-known practitioner of constitutional laws and was famous for various Public Interest Litigation.
[3] He also represented MPs in the bribery case leading to the Supreme Court defining privileges of Parliament and State Legislature.
One of his last appearances in the Delhi High Court was for Patriots' Forum, an NGO, which challenged the findings of the Justice Rajinder Sachar Committee, meant to look into the social, economic and educational status of Muslims.
He argued that promotion of Muslims as a religious community would result in "destruction" of the secular polity promised by the Indian Constitution.
[5] Pran Nath Lekhi was regarded by many to be Ram Jethmalani's candidate to be the Attorney General but the slot that was ultimately filled by Soli Sorabjee, a legal luminary from the liberal school.
[6] On 23 January 1986 The Hindustan Times reported the statement of Lekhi under two captions: (1) 'Lekhi calls verdict a farce', and (2) 'High tension at Tihar'.
At this juncture, Shri Salman Khurshid, advocate for the petitioner, realizing the force of the above view contended that the matter may be postponed sine die and taken up after the appeals are finally decided, however the same was rejected.
The Delhi High Court disposed of the petition with the following observations and dropped the proceedings – "the expressions and the language, used in the offending passages are very strong and in our view should have been avoided by Shri Lekhi".
He has handled variety of matters in the Supreme Court, most popular among them are Constitutional validity of ban on lotteries, Lajpat Nagar bomb blast, Redfort shootout, Vasantkunj multiple murder case etc.