Jacometti was born in
San Pietro Mosezzo,
Province of Novara, on 10 March 1902. Before the election Jacometti, Riccardo Lombard and
Giuseppe Romita led the opposition group against Basso's leadership. Jacometti's term as the secretary general was brief and ended in 1949 when he was forced to resign from the office due to the opposition of
Pietro Nenni and Lelio Basso. Jacometti served at the Italian Parliament until 1963. He left the Italian Socialist Party in 1984 due to his conflict with the party leader
Bettino Craxi. Jacometti died in his hometown, Novara, 10 January 1985. ==References==