Cairo, Egypt (CNN) -- Opposition leaders and intellectuals met with Egypt's vice president Saturday to discuss avenues for easing embattled President Hosni Mubarak from power, the number one demand of of tens of thousands of demonstrators. Among the proposals under discussion is Article 139 of the constitution, which allows for the vice president to assume control if the president is no longer able. At least one opposition group, the leftist Tagammu party, is asking the government to activate the article's powers so that Suleiman can take charge immediately and allow Mubarak to make a graceful exit. A member of the self-declared Committee of the Wise, told CNN that Suleiman was willing to listen.
@highlight
NEW: Demonstrators try to prevent tanks from passing in Tahrir Square
@highlight
Protesters in Tahrir Square form new opposition group
@highlight
Some opposition leaders meet with the government; others dig in
@highlight
Anti-government protesters are still gathered in central Cairo
Mubarak, said the committee, can remain as a symbolic leader but should delegate to @placeholder responsibility for the transition period.