WASHINGTON (Reuters):

Democrats, who won control of the United States Congress, said yesterday they will push for a phased withdrawal of American troops from Iraq to begin in four to six months, but the White House cautioned against fixing timetables.

"First order of business is to change the direction of Iraq policy," said Senator Carl Levin, a Michigan Democrat who is expected to be chairman of the Senate Armed Services Committee in the new Congress.

Democrats will press President George W. Bush's administration to tell the Iraqi government that U.S. presence was "not open-ended, and that, as a matter of fact, we need to begin a phased redeployment of forces from Iraq in four to six months," Levin said on ABC's 'This Week' programme.

Bush has insisted that U.S. troops would not leave until Iraqis were able to take over security for their country, and has repeatedly rejected setting a timetable for withdrawal because, he says, that would only embolden the insurgents.

New ideas

The White House said, however, that Bush is open to new ideas. Bush will meet today with the bipartisan Iraq Study Group that is expected to recommend alternative policies in its final report.

More than 2,800 American troops have been killed in Iraq since the 2003 U.S.-led invasion and the unpopular war was a key factor in last week's elections in which Bush's Republican Party lost majorities in the Senate and the House of Representatives.

White House Chief of Staff Josh Bolten said it was important that any action be taken in a way to ensure that Iraq can succeed and have a democratic government that can sustain and defend itself.

"It's hard for me to see how that can be done on a fixed timetable," Bolten said on ABC's 'This Week' programme. "But the president's open to fresh ideas here. Everybody's reviewing the situation."