When he returned to the United States, Eqbal Ahmad taught at the University of Illinois at Chicago (1964–65) and Cornell University in the school of Labour Relations (1965–68). During these years, he became known as one of the earliest and most vocal opponents of American policies in Vietnam and Cambodia. From 1968 to 1972, he was a fellow at the Adlai Stevenson Institute in Chicago. In 1971, Eqbal Ahmad was indicted as one of the Harrisburg Seven, with the anti-war Catholic priest Philip Berrigan, Berrigan's future wife, Sister Elizabeth McAlister, and four other Catholic pacifists, on charges of conspiracy to kidnap Henry Kissinger. After fifty-nine hours of deliberations, the jury declared a mistrial, in 1972.