WASHINGTON - Encouraged by the death of a top terrorist leader and continued progress on the formation of a new government in Iraq, President Bush is gathering his top military and civilian war advisers to plan the U.S. role in the country's future.

The president planned two days of meetings at the mountainous Camp David presidential retreat starting today, with national security advisers on hand and top commanders in Iraq connected by videoconference.

White House officials have said announcements of force reductions are not expected. Yet the top U.S. commander in Baghdad predicted on the eve of the meeting that coalition troops will gradually move out of the country in the coming months.

Gen. George Casey said he thinks it will be possible to withdraw some of the 130,000 U.S. forces in the months ahead as long as Iraq's government and security forces make progress.

Casey would not say whether he plans to advise Bush on a troop reduction plan today. But the general hinted the time soon may come for such a recommendation.

“I was waiting until we got a government seated before I gave the president another recommendation so we have some sense of what we've got,” Casey said Sunday on CBS' “Face the Nation.”

Iraq's prime minister, Nouri al-Maliki, took office last month and appointed the key final ministers last week.

Bush has said the new government marks a new chapter in the U.S. relationship with Iraq. With Republicans worried about losing control of Congress in November's midterm elections and most Americans saying they would like some troops to come home, Bush is under pressure. Only a third of respondents to an Associated Press-Ipsos poll in early June supported Bush's handling of the situation - an all-time low.

But he has been careful not to signal any troop reductions yet, continuing to say he will make those decisions when commanders in the field advise him to do so.

Casey said reductions could be coming soon, albeit slowly.

“I think as long as the Iraqi security forces continue to progress and as long as this national unity government continues to operate that way and move the country forward, I think we're going to be able to see continued gradual reductions of coalition forces over the coming months and into next year,” Casey said.

Iraq's national security adviser said Sunday that he believed the number of coalition forces would drop below 100,000 by year's end. Mouwafak al-Rubaie also said the majority of coalition forces would leave before mid-2008.

Bush announced the Camp David meetings last week, as he applauded U.S. forces for conducting an airstrike that killed Abu Musab al-Zarqawi, the leader of al-Qaida in Iraq. The president has cautioned that al-Zarqawi's death will not end the war, but he says it will help.

Rep. John Murtha, D-Pa., a critic of U.S. involvement in Iraq, said today that now is “a perfect time” for a troop withdrawal. “People want a change in this country ... a change in direction, and I hope the president hears that and I hope the Iraqis ask us to leave,” Murtha said on ABC's “Good Morning America.”

“Even this attack on Zarqawi happened from the air,” Murtha said. “There's no real need for us to be inside the country.”

The re-evaluation of the administration's Iraq policy starts with a long day of meetings for Bush, his national security team and the military commanders. It continues with a luncheon attended by outside experts and dinner tonight.

On Tuesday, the sessions conclude with a joint meeting via videoconference with Bush's Cabinet and top ministers in al-Maliki's new government.

Among the most immediate concerns is how to buttress security operations in and around Baghdad. Some suggest that could involve short-term troop increases.

Casey told “Fox News Sunday” that “it's not likely” that he would request more troops during the discussions, but he did not rule out bringing in more to help secure Baghdad in the future.

Casey described a “great shift” in responsibility from U.S. forces to the Iraqis over the past year. He said more Iraqis are taking the lead in the fight, although that does not mean they can operate without support such as logistics, intelligence and medical evacuations.