Iraqi opposition leaders are taking part in a video conference call at the White House with US Vice President Mr Dick Cheney.
It follows discussions in Washington about the need for a new era of freedom in Iraq.
The Iraqi visitors, representing six opposition groups, have received assurances the US will fulfil commitments to protect Iraqis who face possible attacks from Saddam Hussein's forces.
President George W Bush says he has still made no decision on a timetable for a military strike against Iraq.
A spokesman for the Iraqi delegation, Dr Hamid al-Bayati, says the group had requested US protection for the Iraqi people from "regime oppression".
He also says the Iraqis presented their vision "for the overthrow of the dictatorial regime in Iraq".
The US officials say the Iraqis have made no request for military aid or training.
Secretary of State Mr Colin Powell made a brief appearance at the start of the meeting and told the gathering: "Our shared goal is that the Iraqi people should be free."
At the Pentagon, Defence Secretary Mr Donald Rumsfeld said he would like to see Iraq evolve the way Afghanistan has - with a government that supports terrorism replaced by one with a democratic cast.
PA