WASHINGTON - President Barack Obama will announce his decision on whether to send more U.S. troops to Afghanistan within days after he held a final strategy session with top aides, the White House said on Tuesday.

Obama's announcement, expected to come in a presidential television address next Tuesday evening, comes after weeks of study that some critics have denounced as dithering.

The president on Monday evening held a two-hour meeting in the White House Situation Room with officials including Vice President Joe Biden, Secretary of State Hillary Clinton and Defense Secretary Robert Gates. It was their ninth such meeting on the topic.

Obama's decision focuses on whether to add as many as 40,000 troops to an eight-year-old war that began after the September 11 attacks and has begun to try the patience of Americans.

After completing a rigorous final meeting, President Obama has the information he wants and needs to make his decision and he will announce that decision within days, White House spokesman Robert Gibbs said in a statement.

A picture of the meeting released by the White House showed budget director Peter Orszag also participated -- a sign that the cost of sending more troops is also being discussed.

Obama's announcement was widely expected to come before a NATO meeting on December 7 in Europe in which alliance members could agree to send thousands of additional trainers.

There are about 110,000 foreign troops, including 68,000 U.S. soldiers, in Afghanistan fighting Taliban insurgents.

Obama has been reviewing war strategy in Afghanistan for the past two months after Army General Stanley McChrystal, the top U.S. commander there, said in a report that conditions were deteriorating and 40,000 additional troops were needed as the minimum to quell the insurgency.

AMERICANS DIVIDED

Obama's top national security advisers, including Gates and Admiral Mike Mullen, chairman of the Joint Chiefs of Staff, are believed to have rallied around options that would send 30,000 to 40,000 more troops and trainers.

Obama faces conflicting pressures on Afghanistan.

Americans are divided about whether to send more troops. Republicans in Congress insist more troops are needed to prevent a Taliban resurgence, while his fellow Democrats in general would like to see the United States find a way out of Afghanistan.

Two veteran Democratic lawmakers have called for imposing a war tax to pay for a troop increase. The two are David Obey, chairman of the House of Representatives Appropriations Committee, and Carl Levin, chairman of the Senate Armed Services Committee.

A congressional aide said that under the idea, families earning less than $150,000 a year would be taxed at 1 percent of their tax rates. The tax would be higher for those in the $150,000-to-$250,000 range and those making $250,000 or more.

Democratic Senator Daniel Inouye, chairman of the Senate Appropriations Committee, opposed it. Someone has to demonstrate how it can be done, he said.
Gibbs said it was premature for him to comment.

Former Vice President Dick Cheney told conservative talk radio host Scott Hennen that Obama was taking too long to decide.

The delay is not cost-free, Cheney said. Every day that goes by raises doubts in the minds of our friends in the region about what you're going to do, raises doubts in the minds of the troops.

Gibbs defended the president on Monday.

This is a complicated decision, he said. I think the American people want the president to take the time to get this decision right, rather than to make a hasty decision.

A Washington Post-ABC News poll found last week that 46 percent of Americans supported a large influx of troops to fight insurgents and train the Afghan military, while 45 percent backed a smaller number of new U.S. forces more narrowly focused on training.

Obama and his advisers have debated options ranging from sending tens of thousands more troops to limiting troop increases and concentrating on attacking al Qaeda targets.

One factor that has complicated the deliberations has been concerns about corruption in Afghan President Hamid Karzai's government. Obama has said he wants to ensure he has a reliable partner there. (Additional reporting by Andy Sullivan, Kim Dixon, Adam Entous Caren Bohan, and Jeff Mason; Editing by John O'Callaghan and Jackie Frank)