Though a card-carrying communist, Lăzăreanu also took a seat on the executive council of the Jewish Democratic Committee (CDE), which also included his party colleagues M. H. Maxy, Maximilian Popper, Arthur Kreindler, and Bercu Feldman. During a reshuffle ordered by the communists on April 18, 1948, he took over as CDE Chairman. Shortly after the Arab–Israeli War, he gave public endorsement to the CDE-and-communist platform of anti-Zionism and anti-cosmopolitanism. Foreign policy was also shaped by the writer's son, Alexandru Lăzăreanu, who was reportedly a close collaborator of Foreign Minister Ana Pauker; a staff member of the Romanian Embassy in Washington, D. C. in 1947, he reported on the activities of anticommunist exiles such as Viorel Tilea and Brutus Coste, and tried to coax Peter Neagoe into writing a series of pro-communist novels. A likely agent of the Securitate, he was involved in sponsoring an alleged spy ring, which included Detroit journalist Harry Făinaru. In December 1948, the US State Department demanded that Ambassador Grigore Preoteasa and Lăzăreanu Jr be recalled to Bucharest.