Copps proved to be an influential member of the small Liberal opposition. She became a prominent member of the "Rat Pack," a group of young Liberal MPs who made it their business to bring misery to the Mulroney government. Fully bilingual, she earned both praise and scorn for her spirited attacks on Mulroney and his ministers. She released her autobiography, "Nobody's Baby", only two years into her federal career, and was by all accounts a rising star in Canadian politics. The book came after Minister of Justice John Crosbie told Copps to "just quieten down, baby" during a heated debate. Copps retorted, "I am nobody's baby."