After his son Gebran Tueni's assassination, Ghassan Tueni became the candidate for his son's seat in parliament and won the election. In June 2005, he published an article in "An Nahar" in which he praised Abdul Halim Khaddam's, former vice president of Syria, resignation from the Baath Party. In 2008, following clashes between pro- and anti-Syrian factions in Lebanon, he, along with other PMs, signed the Doha Agreement that ceased Lebanon's worst fighting since the civil war. Tueni's tenure at the parliament lasted until 2009 and his granddaughter Nayla Tueni won the same seat from Beirut.