Rubai Ali's NF
joined with other parties in 1975, creating the United Political Organisation NF (التنظيم السياسي الموحد الجبهة القومية), all rival parties were outlawed earlier. He opposed the idea of the Yemeni Socialist Party's (YSP) future creation promoted by Abdul Fattah Ismail
. He appointed Muhammad Ali Haitham
as his Prime Minister when he became Chairman. Haitham served until August 1971, when he was replaced by Ali Nasir Muhammad
. In 1978, Ali Nasir Muhammad overthrew and executed Rubai Ali, after a short battle which took place in Almodowar Palace
, located in At-Tawahi, Aden, which Rubai Ali used as a fortification.