Marconi was appointed as a Senator of the Kingdom of Italy. This marked the beginning of his formal involvement in Italian politics.

Marconi joined the Italian Fascist Party led by Benito Mussolini. He openly supported Mussolini's regime and its policies. This was a controversial aspect of his life due to the authoritarian nature of the Fascist government.

Marconi was appointed President of the Royal Academy of Italy, a prestigious position that further aligned him with the Fascist regime. He used his influence to promote science and technology within the framework of Fascist ideology.

Marconi publicly supported Mussolini's expansionist policies and the regime's efforts to modernize Italy. His involvement with Fascism has been a subject of debate and criticism among historians and biographers.