She was the founder and leader of the national conservative political party Social Action; from 2004 until 2008, Mussolini also served as a Member of the European Parliament, and she has been a member of the Chamber of Deputies, the lower house of the Italian Parliament, for The People of Freedom.
Ia adalah pendiri dan pemimpin dari partai politik konservatif nasional Aksi Sosial; dari 2004 sampai 2008, Mussolini juga menjabat sebagai Anggota Parlemen Eropa, dan ia menjadi anggota Dewan Deputi, dewan rendah Parlemen Italian, untuk Rakyat Kebebasan.