A new public opinion poll indicates Americans are becoming increasingly dissatisfied with the course of the war in Iraq.

In a poll conducted by CNN, USA Today, and the Gallup organization, one-third of those surveyed said the United States should withdraw all troops from Iraq.

That is the highest percentage calling for a full withdrawal since Gallup began asking the question in August 2003.

The poll of 1004 adults, taken Friday through Sunday, also found that 57 percent of Americans feel the war has made them "less safe" from terrorism.

Fifty-four percent of those surveyed said the United States made a mistake in sending troops to Iraq, up from 46 percent in July.

President Bush's overall approval rating was 45 percent, among the lowest ratings of his presidency.