 Politically Protopopescu supported the fascist and antisemitic organization known as the Iron Guard, and he published the newspaper "Buna Vestire", which was aligned with the Guard.He also actively contributed to other Romanian newspapers such as "Flacăra", "Vieaţa Nouă", "Cuget Românesc", "Cuvântul", "Gândirea", "Lumea Nouă", "Cuvântul Studențesc", "Vremea" and "Porunca Vremii".Protopopescu was the director of the National Theater in Chernivtsi (1926-1927), and also a press attaché at the Romanian Legation in London (1928-1930).