Powerful reformists and conservatives within Iran’s elite have joined forces to wage an unprecedented behind-the-scenes campaign to unseat President Mahmoud Ahmadinejad, worried that he is driving the country to the brink of collapse with populist economic policies and a confrontational stance toward the West.

The prominent figures have put their considerable efforts behind the candidacy of reformist Mir-Hossein Mousavi, who they believe has the best chance of defeating the hard-line Ahmadinejad in the presidential election Friday and charting a new course for the country.

They have used the levers of government to foil attempts by Ahmadinejad to secure funds for populist giveaways and to permit freewheeling campaigning that has benefited Mousavi. State-controlled television agreed to an unheard-of series of live debates, and the powerful Council of Guardians, which thwarted the reformist wave of the late 1990s, rejected a ballot box maneuver by the president that some saw as a prelude to attempted fraud.