Retired US politicians, generals, and officials have been lobbying on behalf of the Iranian group MEK, listed as a terrorist group by the State Department.
Ahead of the March 7 Iraq election, Ahmed Chalabi, who helped convince former President Bush to invade and create a democracy at peace with Israel, is promoting a regional alliance that would include US adversary Iran.
Iraqi lawmakers are divided over legislation required to go ahead with elections scheduled for January. Drawdown of US troops in Iraq was set to speed up after the elections.
Top politicians race to avoid all-out war between feuding Shiite factions as US forces launch airstrikes against Mahdi Army targets.
The US supports a new law designed to allow some members of Saddam Hussein's party to return to government.
The Secretary of State paid a surprise visit Tuesday amid signs that political reconciliation is gaining some traction in Iraq.