Zalmay Khalilzad, the veteran US envoy whose months of patient hotel-ballroom diplomacy helped end the US war in Afghanistan but failed to prevent a Taliban takeover, resigned on Monday.
In a letter to Secretary of State Antony Blinken, Khalilzad defended his record but acknowledged that he came up short and said he wanted to step aside during the "new phase of our Afghanistan policy."
"The political arrangement between the Afghan government and the Taliban did not go forward as envisaged," he wrote. "The reasons for this are too complex and I will share my thoughts in the coming days and weeks."
Born in Afghanistan, the dapper 70-year-old academic turned US diplomat took senior positions as part of the inner circle of former president George W. Bush, becoming the US ambassador to Kabul and then Baghdad and the United Nations.
As former president Donald Trump itched to end America's longest war in Afghanistan, he brought back Khalilzad, who led exhaustive talks with the Taliban -- without including the US-backed government in Kabul.
Those talks led to a February 2020 agreement in which US troops would leave the following year.
But peace negotiations between the Taliban and the leadership in Kabul failed to gain traction, and the government that the United States built over 20 years crumbled within days as US troops left.
- Rare US figure -
Steeped in Afghanistan’s language and customs, Khalilzad was a rare US diplomat able to develop a cordial rapport with Taliban leaders whose regime was toppled by the United States after the September 11, 2001 attacks over its welcome to Al-Qaeda.
Khalilzad, despite his Republican affiliation, was kept in place when Democratic President Joe Biden defeated Trump and decided to go ahead with the withdrawal.
Khalilzad soon became a lightning rod for criticism, with even his superiors in the Biden administration -- while voicing respect for him personally -- faulting the diplomacy behind the 2020 agreement.
Blinken said that Khalilzad's deputy, Thomas West, would take over as the special envoy.
West is a longtime aide to Biden, serving on his staff when he was vice president. West has worked for years on South Asia policy including on the US-India civilian nuclear deal.
Shortly before Khalilzad's resignation became public, the State Department said the United States would not be able to attend a new session called Tuesday by Russia that also includes China and Pakistan, historically the Taliban's primary backer.
- 'Time not on our side' -
After Trump ended US opposition to speaking to the Taliban, Khalilzad engineered the release from a Pakistani jail of the group's co-founder Mullah Baradar, seen as a figure who could deliver on promises, and spent months with the largely rural rebels in a luxury hotel in the Qatari capital Doha.
But pictures of him smiling with the Taliban earned him heated criticism in Kabul where some in the now-fallen government as well as newly Western-oriented elite berated him and accused him of selling out Afghanistan.
In interviews last month, Khalilzad said that he had reached a deal with the Taliban in which the insurgents would stay out of Kabul and negotiate a political transition.
But Khalilzad said the deal collapsed when president Ashraf Ghani fled the country on August 15 and the Taliban saw a security vacuum.
Speaking to Foreign Policy, Khalilzad said that the Taliban fulfilled key parts of the February 2020 agreement including not attacking the departing US troops.
"I respect those who say we shouldn't have negotiated with the Talibs without the government being there. But we don't know how much more fighting would have taken for the Talibs to agree to that," he said.
But with no appetite in the United States for another surge of troops in its longest war, "each year we were losing ground to the Talibs," he said. "Time was not on our side."
Husain Haqqani, a former Pakistani ambassador to Washington who is now a senior fellow at the Hudson Institute, said that Khalilzad failed in that he "equated US withdrawal with peace."
"Khalilzad handed the keys of Kabul to the Taliban in return for promises everyone knew the Taliban would not keep," Haqqani said.
US says won't join Afghanistan talks announced by Russia
The United States said it will not join talks on Afghanistan announced for this Tuesday by Russia that will include two other key players, China and Pakistan.
The State Department blamed logistical issues but said it considered the Russian-led forum "constructive."
"We look forward to engaging in that forum going forward, but we're not in a position to take part this week," State Department spokesman Ned Price told reporters Monday.
Russian envoy Zamir Kabulov on Friday announced the four-nation talks in Moscow, saying they would aim to "work out a common position on the changing situation in Afghanistan."
Russia, China and Pakistan have been among the most active nations in engaging the Taliban since the Islamists took over Afghanistan in August during the US pullout after 20 years of war.
The United States has been encouraging nations not to recognize the Taliban government, hoping for leverage on key issues of concern including the rights of women and girls.
Price declined to explain the logistical issues that prevented the United States from attending.
The talks come amid an intensifying dispute over the number of diplomats the United States is allowed to accredit in Moscow, although Presidents Joe Biden and Vladimir Putin at a June summit agreed to seek cooperation where possible on other areas.