US defense secretary says he favors a 'modest' military presence in Iraq after President Barack Obama set a deadline for a mass drawdown.

"My own view would be that we should be prepared to have some very modest-sized presence," he said.

The United States should have plans in case Iraq chooses to amend the operative agreement that requires all US troops to leave by the end of 2011, he said on Friday, AFP reported.

"The Iraqis have not said anything about that at this point, so it remains to be seen whether they will take an initiative," he commented.

Earlier, Obama announced May 31, 2010 as the deadline for a wholesale pullout which would leave 50,000 troopers in the war-hit country.

Taking Gate's advice among others, however, he reportedly extended the time limit for three months. Gates cited "significant logistical and security issues" for the deferment.

Meanwhile, the large number of the remaining troops clashed with the anticipations of the US congressmen who expected a more sizeable reduction.

Senate leader Harry Reid said 50,000 was "higher than I had anticipated," Reuters reported.

Congressman Lynn Woolsey said "such a large number can only be viewed by the Iraqi public as an enduring occupation force. So long as the US is viewed as an occupier, the Iraqis will be unable to achieve the necessary unification, reconciliation, and further democratization efforts that will be required for them to bring long-term stability to the country," he added.

HN/HAR