He and Vilma Szantho had two children , Loni Hancock , who was mayor of Berkeley , Calif. , and is now a California assemblywoman , and David Harrington , a surgical nurse in Santa Fe , N.M. Dr. Harrington was among the founders of the American Committee for Africa , a prominent anti-apartheid organization , delivered a presidential nominating speech for Norman Thomas , the Socialist , in 1948 and was an early opponent of the war in Vietnam .