ISLAMABAD - Leader of Opposition in the Upper House, Kamil Ali Agha here on Wednesday assailed Acting Chairman Senate, Jan Muhammad Jamali for his announcement to support PPP's presidential candidate, Asif Ali Zardari.    During senate proceedings, Agha threatened Jamali that legal action would be taken against him for violating the party discipline as being the PML-Q parliamentarian he could not announce to support PPP's presidential contender.    Senator Kamil Ali Agha warned Acting Chairman Senate that legal action would be taken against him if he did not deny his announcement about support to Zardari before the presidential elections. Agha who is a lawyer by profession seems ignorant of the anti-defection law that allows party parliamentarians to use their right of vote in presidential polls as per their own choice. After hearing allegations leveled by Kamil Ali Agha, Jam Muhammad Jamali said being the Chairman Senate he had authority to meet Prime Minister or President. If anyone is wanted to take legal action against me, then he should go ahead'. I am Baloch politician and would not bow down and come under pressure, he said, adding that the party matters should not be discussed in the Upper House. Followed by straightforward answer of Acting Chairman Senate Jan Muhammad Jamali, Opposition leader Kamil Ali Agha along with Q-league senators walked out from the house. It was same Kamil Ali Agha who at the time of Mir Zafarullah Jamali's election as PM in 2002 had said that those parliamentarians from opposition parties who were voting for PML-Q's candidate were exercising their right in the 'light of their conscience' instead of their 'personal and party interests'. Agha was then PML-Q's information secretary, Punjab, and had said 'these MNAs are not sucklings who would do as told to'. It is pertinent to mention here that Acting Chairman Senate who belongs to PML-Q along with seven other 'Q' Senators had called on PM two days earlier, and assured him of forward block's support for Asif Ali Zardari. Senator Jan Muhammad Jamali on Wednesday during Senate proceedings, when Agha was criticizing him harshly, refused to reject reports about his meeting with Prime Minister Syed Yousuf Raza Gilani along with 8 Q-league Senators.    Kamil Ali Agha who first appeared on national political horizon in 1997 after winning a National Assembly seat from Lahore from the platform of PML-N, immediately after his mentor's downfall following October 12 1999, had turned his coat and become the loyalist of Pervez Musharraf. It was General (r) Pervez Musharraf who appointed Agha Leader of Opposition in the Senate in April 2008. The only qualification, for which he had been chosen for the post, was his "aggressive" and "attacking" attitude that he exhibited on Wednesday when he was slamming Jamali for betraying party. After the PML-Q's announcement of Agha as the Leader of the Opposition, several senators had expressed reservations over his nomination. Senator Kamil Ali Agha, who entered into politics in 1979 when he won a councilor seat in a union council of Lahore, is among the hawks of PML-Q who still resist reunion of PML. According to party sources in the PML-Q's CEC meeting last month, Agha had asked party lawmakers to keep a distance from Mian Nawaz Sharif, as according to him Nawaz was the man who believed in vendetta and would therefore never accept defiant Q-Leaguers.