Islamabad, May 29: Pakistan's opposition today threatened to block next month's budget unless President Pervez Musharraf agrees to roll back powers he has awarded himself and the military. "We will not only block the speech of finance minister Shaukat Aziz in parliament, we shall also continue our protest throughout the budget session," Pakistan Muslim League-Nawaz (PML-N) parliamentary leader Makhdoom Javed Hashmi told a news agency. Aziz is due to present the budget for financial year 2003-2004 to the national assembly on June 7, amid a political crisis that has effectively crippled the legislature for most of the year. Lawmakers from the PML-N, the Pakistan People's Party (PPP) and Islamists from the Muttahida Majlis-e-Amal (MMA) alliance have stymied repeated sessions by thumping desks, standing on chairs, and drowning out parliamentary business with choruses of "Go Musharraf Go." They want General Musharraf, who stole power in a 1999 coup and has made himself president until 2007, to quit the Army and undergo a presidential election. They also want the more than 20 changes he unilaterally made to the Constitution last year to be debated by parliament. Efforts by the pro-Musharraf ruling party to negotiate a compromise with the combined opposition have so far borne no fruit. Almost three weeks of talks by a joint government-opposition committee resulted in a list of unpublicised recommendations, which are now being mulled by Prime Minister Zafarullah Jamali. Bureau Report