Members of the ruling People's Action Party paid tribute to Senior Minister Lee as part of its 70th anniversary celebrations. SINGAPORE: People’s Action Party (PAP) secretary-general Lee Hsien Loong is set to step down as its leader, as tributes poured in on Saturday (Nov 23) as part of the ruling party's 70th anniversary celebrations. Senior Minister Lee handed over the prime minister position to his successor Lawrence Wong in May this year. Mr Lee is expected to step down as secretary-general