Could the administration of President Barack Obama hasten the downfall of Iran’s government by taking an opposition group off the U.S. list of terrorist organizations? To hear a growing roster of influential former government officials tell it, the answer is yes.

The opposition group in question is the Mujadeen-e-Khalq (MEK) and the growing list of Washington insiders coming out in its support include two former Central Intelligence Agency chiefs (James Woolsey and Michael Hayden), two chairmen of the Joint Chiefs of Staff (Peter Pace and Hugh Shelton), former Attorney General Michael Mukasey, former Homeland Security chief Tom Ridge and former FBI head Louis Freeh.

The MEK was placed on the terrorist list in 1997, a move the Clinton administration hoped would help open a dialogue with Iran, and since then has been waging a protracted legal battle to have the designation removed. Britain and the European Union took the group off their terrorist lists in 2008 and 2009 respectively after court rulings that found no evidence of terrorist actions after the MEK renounced violence in 2001.

In Washington, initial support for “de-listing” came largely from the ranks of conservatives and neo-conservatives but it has been spreading across the aisle and the addition of a newcomer of impeccable standing with the Obama administration could herald a policy change not only on the MEK but also on dealing with Tehran.

The newcomer is Lee Hamilton, an informal senior advisor to President Obama, who served as a Democratic congressman for 34 years and was co-chairman of the commission that investigated the events leading to the September 11, 2001 attacks on Washington and New York.