There are uncertainties around many of Joe Bidenâs Cabinet selections, but not around one. Barring a shocking change in the coming weeks, Michele Flournoy, a senior Pentagon official during Bill Clintonâs and Barack Obamaâs presidencies, will be the next secretary of defense and the first woman to run the Pentagon in its 73-year history.
Illinois Sen. Tammy Duckworth is also under consideration, per a source familiar. So is Jeh Johnson, the former Department of Homeland Security secretary. But Flournoy is the clear frontrunner for the job.
A centrist, and perhaps the Democratic Partyâs foremost defense expert, she has a well of bipartisan respect from the defense world. Part of how she earned her current prestige, however, was in helping craft Obamaâs Afghanistan war strategy, which paved the way for a futile escalation. The surge of troops up to a 2010 high of 100,000, which was opposed by then-Vice President Joe Biden, yielded little durable achievement in return for the lives of hundreds of troops, and of even more Afghans.
Now Flournoy is poised to be part of a team that will inherit from President Donald Trump a negotiated settlement with the Taliban as a means of extrication from the 19-year conflict. That deal is floundering under the weight of a sharp escalation in Taliban violence. The decision will be Bidenâs, but Flournoy will be a crucial voice in deciding whether the U.S. stays in the dealâand whether it will withdraw or leave a residual force that continues Americaâs longest war. Itâs a test of what Biden means when he says he plans on ending endless wars.
To say Flournoy has the respect of her peers and the officer corps is an understatement. Throughout her career, she has cultivated relationships with the military, unlike many Democratic wonks. Accordingly, allies expect her to have particular success in managing often fraught civilian-military relations.
âMichele is an exceptional leader, thinker, and person. She is unflappable during crises and always very thoughtful and measured in her assessments and advice,â said David Petraeus, the retired Army general who commanded the Iraq and Afghanistan wars during both surges. âShe also listens, but does not hesitate to make decisions when that moment arrives.â

Michele Flournoy and Gen. David Petraeus in June 2010.
Karen Bleier/AFP via GettyFlournoyâs likely elevation comes after a decade of expectation that she would run the Pentagon in an Obama or Hillary Clinton administration. During her early career in the 1990s, Flournoy threw herself into large questions of post-Cold War American strategy, and she took an early interest in unconventional warfare and nuclear security, ahead of many of her peers. Inside the Pentagon; at the think tank she co-founded, the Center for a New American Security (CNAS); and elsewhere, she has mentored scores of defense experts who will take positions in future Democratic and even Republican administrations. (Kath Hicks, who was one of Flournoyâs deputies at the Pentagon, is leading Bidenâs Pentagon transition team.) In meetings, Flournoy has a reputation for thoroughness and preparedness. She has mentioned that when focused, her facial expression can appear to be skeptical, something that prompted Obama to call on her to provide a dissenting view.
âNo one has more diligently prepared, trained, equipped to be the next Secretary of Defense than Michele Flournoy,â said Kurt Campbell, an Obama-era assistant secretary of state who co-founded CNAS with Flournoy. âThe challenges aheadâbudgetary, operational and strategicâare enormous, and Michele is the best positioned to take them all on.â
Kori Schake, a defense expert at the conservative American Enterprise Institute, shares Campbellâs high opinion of Flournoy. âMichele would be a solid choice, and a popular one in the Pentagon. Sheâd bring leadership, policy, and commercial experience well-suited to DODâs current challenges,â she said.
But others have concerns about Flournoyâs hawkish tendencies. âAcross the board, thereâs an expectation that she would push Biden to continue Trump policies where theyâre already pretty interventionistâYemen, Chinaâand discontinue them where theyâre not, with Afghanistan the most obvious example there,â said Emma Ashford, a senior fellow at the Atlantic Councilâs Scowcroft Center.
Early in 2009, with U.S. fortunes in the Afghanistan war deteriorating rapidly, the former CIA official Bruce Riedel conducted a strategy review for turning the war around, with Flournoy and the diplomat Richard Holbrooke as deputies. It concluded that the Obama administration needed to embrace counterinsurgency more fulsomely in Afghanistan and recommended a 4,000-troop increase, primarily to train Afghan soldiers and police. But Obama announced that the objective of the strategy was to yield not a more functional Afghan state or the defeat of the Taliban but to âdisrupt, dismantle, and defeatâ al Qaeda. It spoke to a sharp disagreement over the war between what Obama wanted and what the Pentagon wanted.
Flournoy attempted, at a March 2009 press conference, to square the circle. Yes, she affirmed, the ultimate goal was to decimate al Qaeda, as Obama had said. But âit is very much a counterinsurgency approach to that end,â and so the administration would âmore fully resource a counterinsurgency strategy.â
Flournoy did not come up with the Afghanistan surge. But it followed from the strategy review she helped craft. Her boss, Defense Secretary Robert Gates, installed Gen. Stanley McChrystal to implement counterinsurgency in Afghanistan. By the end of 2009, McChrystal advocated a much, much larger surge than Riedelâs team did: 40,000 troops. Obama settled on a 30,000-troop increase and the surge began. Flournoy supported it throughout. âOur overall assessment is that we are heading in the right direction in Afghanistan,â she told a Senate panel in June 2010. By the following March, Flournoy was more equivocal, testifying that the âsignificant gains we have made in the last year are still reversible.â
By February 2012, before the surge forces fully departed from Afghanistan, Flournoy left the Pentagon to rebalance her family life, something men, particularly at Flournoyâs level, are not expected to do.
Whatever tactical successes the surge yielded, even with a force that rose to 100,000 troops, were not durable. One casualty tally of the surge years of 2010-12 records 1,223 U.S. troop deaths, about half of American KIAs in the entire war. The intensified fighting did not convince the Taliban that its position was untenable. The Obama administrationâs hopes of leveraging the surge into a negotiated settlement to end the war foundered. The administration pivoted to drawing down troops, phasing out direct U.S. combat missions, and building up the Afghan security forces. Over the subsequent years, the Taliban grew in strength and reconquered substantial amounts of Afghan territory, ultimately prompting the Trump administration to launch the direct, high-level diplomatic effort with the Taliban that the Obama team could not achieve.

Flournoy, second from right, looks on as President Barack Obama announces a new comprehensive strategy for Afghanistan and Pakistan in March 2009.
Ron Edmonds/APPetraeus pushed back against the notion that the surge achieved little. He argued that it âdid halt and then reverse the momentumâ of the insurgencyâparticularly in the south and the east of the country where it was strongestâwhich was the goal Obama announced in December 2009.
âThat allowed acceleration of the development of Afghan security forces and critical government institutions. That allowed the beginning of transition of tasks to Afghan forces and key institutions and the beginning of the drawdown of U.S. and coalition forces at the end of the surge. And that is what has enabled Afghanistan, with continued financial and military support from the U.S. and coalition forces, to prevent the extremists and terrorists from taking key cities, though the situation has clearly deteriorated in a very worrisome way,â Petraeus said. âBut had it not been for the surge, none of that would have been possible. And had we settled on a small, capable, sustained commitment, the accomplishments of the surge could have been sustained much better than has been the case.â
Yet when the surge ended, there was little reckoning with how little it yielded. Last week, the watchdog Special Inspector General for Afghanistan Reconstruction (SIGAR) found that Taliban attacks on Afghan government forces between July and September spiked by an alarming 50 percent over the spring. Itâs been like that since the February 2020 peace deal signed between the U.S. and the Taliban. The Defense Department told SIGAR that the Taliban is âcalibrating its use of violenceâ to stay just below the threshold that would likely break the deal. It warned that the Talibanâs actions âcould undermine the agreement.â The deal obligates the Taliban to suppress al Qaeda, yet in late October, Afghan forces in a part of Ghazni province under Taliban control killed a man it claims was a senior al Qaeda leader.
Biden will not have very much time to decide whether to remain in the deal. The agreement calls for the withdrawal of âall military forcesâ by May 2021. Among the decisions immediately confronting his foreign-policy team is whether to retain envoy Zalmay Khalilzad and if itâs worth slowing the pace of withdrawal to leverage whatever influence the U.S. retains in order to reduce the violence. Then thereâs the challenge of convincing a reluctant U.S.-backed Afghan government to share power with its Taliban adversariesâsomething most expect to be the inevitable outcome of the inter-Afghan peace talks that began last month. All this is shaping up as an imminent test of Bidenâs campaign pledge to âend the forever warsâ and âbring the vast majority of our troops home from the wars in Afghanistan and the Middle East.â (Note that Biden didnât pledge to bring them all home.)
âThereâs been a real shift in opinion in the Washington foreign-policy community over the last few years, âfrom the idea that the war in Afghanistan is absolutely vitalâ to âAfghanistan is still kind of a problem, but not a priority, but we canât figure out how to get out of it, either,ââ said the Atlantic Councilâs Ashford. âThat is how many people view this problem. Flournoy, I think, falls into that small group of people that still argue itâs vital for the U.S. to retain a presence in Afghanistan, and thatâs a much smaller group now.â
Like most of the foreign-policy establishment, Flournoyâs more recent thinking centers less around Afghanistan than on confronting China, elevating pandemic defense to a central national security priority, and the military applications of artificial intelligence. Rankling progressives, she is a board member of the security contracting giant Booz Allen Hamilton and co-founded a consulting firm, WestExec Advisors, with likely Biden secretary of state or national security adviser Tony Blinken. WestExec employs a host of Obama security veterans, retired flag officers, and likely future Biden appointees. On Thursday, the progressive Reps. Mark Pocan (D-WI) and Barbara Lee (D-CA) called on Biden not to choose anyone tied to the defense industry as the next Pentagon chief, something that also applies to Lockheed Martin board member Jeh Johnson, whom Biden is also considering for the Pentagon.
Flournoy, as expected for a likely Cabinet nominee, declined to speak for this piece. But on a podcast with McChrystal, Flournoy recently reflected on the Afghanistan surge, the weight of life-or-death decision-making, and what she learned from the experience.
âHad I to do this again, I would have asked the question: Under what conditions has counterinsurgency succeeded and not succeeded?â Flournoy said. âHow do we assess the Afghan situation relative to those historical cases? Because I think we went in believing we had a different kind of partner in the Afghan government than we actually did, and I think that was a sort of critical vulnerability in the approach, in hindsight. But I think, had you had a historian at the table, maybe we would have sort of talked that through or had that insight, and Iâll speak for myself, I didnât have that insight until we were in the middle of it, learning the hard way.â
AEIâs Schake says itâs unfair to blame the failures of the Afghanistan war on Flournoy. âResponsibility for the mistakes of Afghanistan war policy rest predominantly outside DODâwith the White House across three administrations, and with agencies that didnât make possible a âwhole of governmentâ effort,â she said. âI think the right public standard for âreckoningâ is whether they were acting in good faith, which Michele Flournoy absolutely does.â
Musing on McChrystalâs podcast about leadership lessons from the Obama-era Afghanistan debate, Flournoy reflected, âPeople get very attached the more they put into something, the greater the sunk costs, the more they cling to a course of action. One of the first things you learn in business school is do not make decisions based on sunk costs. But itâs really, really hard, particularly in a case where youâve put real peopleâs lives on the line, thereâs serious sacrifice that have been made, to take new information and change that strategy. But I think the best decision-makers do make those adjustments.â
How progressives react to a Flournoy Pentagon depends in no small part on whether she applies that insight to ending the Forever War.