Qanso joined the Lebanese Ba'ath in 1953. During the
Lebanese war, the Lebanese Ba'ath was divided into two hostile groups: a
pro-Iraqi group and a
pro-Syrian group. Qanso is staunchly pro-Syrian. Relations between the
Kataeb Party and the Ba'ath Party improved when on the orders of
Karim Pakradouni (the leader of the Kataeb Party) and Qanso agreed to establish a committee between the two parties to discuss Lebanese and Arab politics. Relations improved further when the Syrian Ba'athist government increased its contacts with the Kataeb Party. During the Lebanese civil war, the Lebanese parliament formed the National Dialogue Committee in 1975; Qanso was a National Dialogue Committee representative. Qanso opposed the notion that the resignation of
Suleiman Frangieh, the
President of Lebanon, would end the conflict. Following the death of
Hafez al-Assad in 2000, notable figures such as
Abdul Halim Khaddam and
Ghazi Kanaan, supported
Rafic Hariri against
Émile Lahoud, the then sitting President of Lebanon, during the
2000 general election. Qanso supported Khaddam and Kanaan's position, and declared during a parliamentary session "there is no zaim [leader] but Rafik Hariri." He later changed his position and supported to extend Lahoud's mandate, and Qanso began criticising the opposition. Qanso warned Walid Jumblat that "you are not out of reach of our militants". ==2009 election and parliamentarian==