From 1981 to 1986 he was senator for the Hauts-de-Seine, then president of the RPR group in the Senate. From 1986 to 1988 he was Interior Minister (in charge of law enforcement). In 1992, he called a vote against the ratification of the Maastricht Treaty. He became Interior Minister again from 1993 to 1995, and supported the candidacy of Edouard Balladur at the 1995 presidential election. He is mostly remembered for having pushed a series of anti-immigration laws (lois Pasqua), and for his declaration "we will terrorize the terrorists."