Administration officials also want time to launch a public relations offensive to convince an increasingly skeptical public and a wary Democratic Congress — which must agree to fund the administration's plan — that the war, now in its ninth year and inflicting rising casualties, is one of "necessity," as Obama said earlier this year.

"This is not going to be an easy sell, especially with the fight over health care and the (Democratic) party's losses" of the governors' mansions in New Jersey and Virginia last week, said one official.

Generating public, congressional and international support for a troop increase will require heavy pressure on Afghan President Hamid Karzai to crack down on endemic corruption and drug trafficking, surrender more power to provincial and local governments and improve public services, the officials said. Karzai won a second term last week when his first-round election opponent bowed out of a run-off.

"Another reason for the president to hold off for a bit on ordering more troops to Afghanistan is that we can tell Karzai that if he doesn't act firmly now, there won't be any support for a troop increase," said one official. "That has the added advantage of being true, and it's easier to hold off on sending more troops than it is to threaten to pull them out once they're there."

U.S. allies already have begun applying pressure. On Thursday, Kouchner called Karzai "corrupt," and the next day, British Prime Minister Gordon Brown said that if Karzai's government didn't attack corruption, international support against the Taliban-led insurgency would evaporate.

"Sadly, the government of Afghanistan had become a byword for corruption," Brown said in a speech. "And I am not prepared to put the lives of British men and women in harm's way for a government that does not stand up against corruption."

As McClatchy reported last week, the Obama administration has been quietly working with U.S. allies and Afghan officials on an "Afghanistan Compact," a package of reforms and anti-corruption measures that it hopes will boost popular support for Karzai and erase the doubts about his legitimacy raised by his fraud-tainted re-election.

The officials said that as of Friday, when Obama's top military advisers met for at least the seventh time to discuss the strategy in Afghanistan, the president had spent nearly 20 hours in meetings on Afghanistan. The planned troop increase may be his best hope to balance the competing political, economic and international pressures his administration is feeling.

Republicans have pressed for a decision, and many at the Pentagon and in conservative political circles argue that Obama, who has little experience in military affairs, should back his commander and send him whatever troops he's requested. The president, they note, called McChrystal the best general the military had to tackle Afghanistan when he appointed him to his post last summer.

Other military officers, particularly in the Army, warn that committing more troops to Afghanistan could risk "breaking" the force by reducing the time soldiers can spend at home between deployments, overtaxing equipment and destroying families. Those problems could worsen if Iraq's January elections are delayed or disrupted, and with them the administration's timetable for withdrawing U.S. forces from that country.