A secret deal being negotiated in Baghdad would perpetuate the American military occupation of Iraq indefinitely, regardless of the outcome of the US presidential election in November. The terms of the impending deal, details of which have been leaked to The Independent, are likely to have an explosive political effect in Iraq. Iraqi officials fear that the accord, under which US troops would occupy permanent bases, conduct military operations, arrest Iraqis and enjoy immunity from Iraqi law, will destabilise Iraq's position in the Middle East and lay the basis for unending conflict in their country. But the accord also threatens to provoke a political crisis in the US. President Bush wants to push it through by the end of next month so he can declare a military victory and claim his 2003 invasion has been vindicated. But by perpetuating the US presence in Iraq, the long-term settlement would undercut pledges by the Democratic presidential nominee, Barack Obama, to withdraw US troops if he is elected president in November. The timing of the agreement would also boost the Republican candidate, John McCain. Under the terms of the new treaty, the Americans would retain the long-term use of more than 50 bases in Iraq. American negotiators are also demanding immunity from Iraqi law for US troops and contractors, and a free hand to carry out arrests and conduct military activities in Iraq without consulting the Baghdad government. The precise nature of the American demands has been kept secret until now.