With only three weeks left before United States military forces are scheduled to begin withdrawing from Afghanistan, the debate over the size and pace of that withdrawal has become increasingly intense. On one hand, the Pentagon, backed by prominent neo-conservatives and other hawks, insists that the 18-month-old surge of 30,000 US troops has turned the strategic tide against the Taliban. Anything more than a modest drawdown of a few thousand of the nearly 100,000 soldiers and marines there through the end of the year, they argue, risks losing all that has been gained. I would hope that [the withdrawal] is very small, the 2008 Republican presidential candidate, Senator John McCain, told the Financial Times this week. I would hope that it is 3,000. We need another fighting season [against the Taliban]. On the other hand, President Barack Obamas political advisers, backed by a strong majority of Democrats and a small but growing minority of Republicans in congress, are arguing for a much more substantial withdrawal. In the clearest marker so far, the influential chairman of the Senate Armed Services Committee, Carl Levin, said this week that at least 15,000 troops should be withdrawn between July and the end of the year. His appeal came just days after the ranking Democrat on the House subcommittee that oversees the Pentagons budget, Norm Dicks, shocked Washington by calling for an end to the US military presence in Afghanistan before 2014. Current plans call for the US and its North Atlantic Treaty Organization allies, which have sent more than 40,000 troops, to withdraw all their combat forces by the end of that year. We need to start seeing if we can do this [withdrawal] a little faster, Dicks, a veteran Democratic hawk, told Politico. I think the American people would overwhelmingly like to see this brought to a conclusion sooner than 2014, he said, citing growing war fatigue in congress. Obama, who has promised that the initial withdrawal would be significant, has otherwise kept his cards close to his chest. The White House said he was still waiting to receive formal recommendations from the outgoing Defense Secretary Robert Gates, who met with military commanders during a three-day farewell visit of Afghanistan that began on the weekend. The withdrawal debate has intensified steadily since the May 2 killing by US Special Forces of al-Qaeda chief Osama bin Laden at a compound in the Pakistani resort town of Abbottabad where he had apparently been living for six years. Until then, it appeared that the Pentagon and its civilian allies would prevail upon Obama to withdraw only a modest - if not token - number of troops in July and through the end of the year. But Bin Ladens demise gave new momentum to the wars critics who have long argued that al-Qaeda had, for all practical purposes, left Afghanistan in 2001 and that Washingtons military-led counter-insurgency (COIN) strategy there was overly ambitious and largely ineffective, if not counter-productive. Weve gone from being waist- to chest-deep in quicksand, noted Matthew Hoh, who directs the Afghanistan Study Group and served in Afghanistan as both a Marine captain and a State Department adviser. At the same time, the growing focus in congress about the yawning government deficit has cast a harsher light on the wars enormous cost - some US$10 billion a month, not including another $300 million a month for civilian-led aid projects. It was these considerations, as well as unhappiness with US military operations in Libya, that led late last month to near-passage by the House of Representatives of an amendment to the $690 billion 2011 defense authorization bill that required Obama to submit a plan for withdrawing US troops and an accelerated transition of US operations there to the Afghan government. The amendment, which was defeated 204-215, gained the votes of all but eight Democrats and 26 Republicans - a total of nearly 42 more votes than a similar measure last year. The vote, which was taken as a strong indication of war weariness, appears to have tilted the balance in the debate, as the Pentagon and its backers stepped up their public campaign for a modest withdrawal of just a few thousand troops beginning in July. Thus, a Washington Post/ABC poll released earlier this week that showed a sharp increase - from 31% last March to 43% after Bin Ladens death - in the percentage of people who believe that the war in Afghanistan has been worth the costs was seized on by one former George W Bush administration adviser as evidence that Obama probably has the political breathing room to choose a measured withdrawal as opposed to a rapid retreat. The same survey, however, showed found that three out of four respondents favored withdrawing a substantial number of US combat forces from Afghanistan this summer. At the same time, Kimberly and Frederick Kagan, neo-conservative military analysts close to the outgoing US commander in Afghanistan, General David Petraeus, published an op-ed in the Wall Street Journal arguing that nothing about conditions on the ground justifies the withdrawal of any US or coalition forces. Moreover, they warned, if Obama withdraws all 30,000 surge forces by the end of 2012, the war will likely be lost. Gates, who has called for a modest drawdown, has not offered a specific number, but, since the House vote, in particular, he has made clear that he wants as few combat troops as possible to leave. I think we shouldnt let up on the gas too much, at least for the next few months, he said over the weekend. He has also hinted that he will speak out publicly in support of the current strategy after he steps down at the end of the month. Whether this will be enough to sway Obama, who has been criticized by his fellow-Democrats for deferring too much to the military, remains to be seen. But it is clear that disillusionment with the war is spreading in both parties. Releasing a highly critical staff report on the effectiveness and sustainability of US aid programs in Afghanistan on Wednesday, Senate Foreign Relations Committee Chairman John Kerry expressed strong doubts about the current strategy. While the United States has genuine national security interests in Afghanistan, said Kerry, a key foreign policy ally of the White House, our current commitment, in troops and dollars, is neither proportional to our interests nor sustainable. His remarks were seconded by the Committees ranking Republican, Senator Richard Lugar. Despite 10 years of investment and attempts to better understand the culture and the regions actors, we remain in a cycle that produces relative progress but fails to deliver a secure political or military resolution, he said. Undoubtedly, we will make some progress when we are spending more than $100 billion per year in that country. The more important question is whether we have an efficient strategy for protecting our vital interests that does not involve massive open-ended expenditures and does not require us to have more faith than is justified in Afghan institutions, he said. Antiwar