WASHINGTON -- President Barack Obama is nearing a decision to send more than 30,000 additional U.S. troops to Afghanistan next year, but he may not announce it until after he consults with key allies and completes a trip to Asia later this month, administration and military officials have told McClatchy Newspapers.

As it now stands, the administration's plan calls for sending three Army brigades from the 101st Airborne Division at Fort Campbell, Ky., and the 10th Mountain Division at Fort Drum, N.Y., and a Marine brigade, for a total of as many as 23,000 additional combat and support troops.

Another 7,000 troops would man and support a new division headquarters for the international force's Regional Command South in Kandahar, the Taliban birthplace where the U.S. is due to take command in 2010. Some 4,000 additional U.S. trainers are likely to be sent as well, the officials said.

The first additional combat brigade probably would arrive in Afghanistan next March, the officials said, with the other three following at roughly three-month intervals, meaning that all the additional U.S. troops probably wouldn't be deployed until the end of next year. Army brigades number 3,500 to 5,000 soldiers; a Marine brigade has about 8,000 troops.

The plan would fall well short of the 80,000 troops that Army Gen. Stanley McChrystal, the top U.S. military commander in Afghanistan, suggested as a "low-risk option" that would offer the best chance to contain the Taliban-led insurgency and stabilize Afghanistan.

It splits the difference between two other McChrystal options: a "high-risk" one that called for 20,000 additional troops and a "medium-risk" one that would add 40,000 to 45,000 troops.

The officials, all of whom spoke on the condition of anonymity because they weren't authorized to discuss internal administration planning, cautioned that Mr. Obama's decision isn't final, and won't be until after administration officials discuss it with the NATO allies at a Nov. 23 meeting of the alliance's North Atlantic Council and its Military Committee.

Coalition forces now include 67,000 U.S. troops and 42,000 troops from other countries. The Army's counterinsurgency manual estimates that an all-out counterinsurgency campaign in a country with Afghanistan's population would require about 600,000 troops.

Although the administration privately is holding out little hope of persuading Canada or the Netherlands to abandon their plans to withdraw combat troops, much less getting additional allied troops, it wants to avoid creating the impression -- at home and abroad -- that the U.S. "is going it alone" in Afghanistan, said one military official.

In an interview last week with The New York Times, French Foreign Minister Bernard Kouchner complained that the American administration is leaving its NATO allies in the dark about its new strategy.

"What is the goal? What is the road? And in the name of what?" Mr. Kouchner asked, according to the Times. "Where are the Americans? It begins to be a problem . ... We need to talk to each other as allies."

The officials said Mr. Obama also wants to complete his Nov. 11-19 Asia trip and a state visit by Prime Minister Manmohan Singh of India, the arch foe of Pakistan, a key U.S. ally in the war on terror, before he announces his Afghanistan plan.

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 Mr. 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, to surrender more power to provincial and local governments and improve public services, the officials said. Mr. 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, Mr. Kouchner called Mr. Karzai "corrupt," and the next day, British Prime Minister Gordon Brown said that if Mr. 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," Mr. 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."

Also last week, the top U.N. official in the country, Norwegian diplomat Kai Eide, called on the Afghan government to take concrete steps to clean up the government following a presidential election that was marred by fraud.

But yesterday the Afghan Foreign Ministry condemned such comments as interfering in national sovereignty.

"Over the last few days some political and diplomatic circles and propaganda agencies of certain foreign countries have intervened in Afghanistan's internal affairs by issuing instructions concerning the composition of Afghan government organs and political policy of Afghanistan," the statement said. "Such instructions have violated respect for Afghanistan's national sovereignty."

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 Mr. Karzai and erase the doubts about his legitimacy raised by his fraud-tainted re-election.

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

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