Khurshid Mahmud Kasuri was one of the few members of the Pakistan Muslim League who always expressed his views on all the national issues frankly and fearlessly regardless of whether the government of the day liked his views or not. In 1997, he publicly called for the issue of the impeachment of the former President Farook Ahmad Leghari, and raised objections on the Fourteenth Amendment and Fifteenth Amendment; he expressed very strongly and issued statements on the constitutional changes. He lobbied against the Fifteen Amendment, particularly as originally presented, was strongly objected to by him. It was primarily due to his efforts and his colleagues lobbying that the Sharif's government had to make an amendment in the Fifteenth Amendment, which contained provisions, which were highly detrimental to the federal and democratic structure of the Constitution. Kasuri put immense effort to stop the bill becoming into the law in its original shape that he threatened Prime Minister Sharif to resign from the party and his constituency unless the bill was amended, and notably resigned from the party, though resignation was torn up by Sharif in a stormy meeting of the Parliamentary party.