"I think when this is over, the American people will have a clear understanding of what I did," he told reporters this weekend. "That's the job. My job is to make judgments. My job is to make judgments no one else can or will make."
When the Taliban completed their surge across Afghanistan by taking over Kabul in the middle of August, the Biden administration had the appearance of a deer in the headlights.
In Kabul, there was chaos as panicked Afghans mobbed the airport, leading to horrific scenes of people trying to hold on to airplanes and falling to their deaths.
Back home, Biden was initially invisible, prompting a torrent of criticism from Republicans and some of his own allies.
Now, though, the White House is trying to wrest back control of the narrative.
Part of that is down to the Pentagon, whose daily briefings filled the information vacuum left early on by the White House.
But increasingly it's 78-year-old Biden leading the charge with a message centered on his insistence that Americans are witnessing not a debacle but a bravely executed withdrawal from a war that had to end regardless.
So far, the spin is not helping Biden's political standing, already hammered by the coronavirus Delta variant and a civil war over masks and vaccines.
An NBC poll published Sunday gave Biden a 49 percent approval rating, down from 53 percent four months earlier. Disapproval for the Democrat had shot up from 39 to 48 percent.
On his handling of Afghanistan, disapproval was a stunning 60 percent.
Biden, though, is the model Washington "happy warrior" type -- a politician whose default setting is on optimistic.
Confronted with the dark poll numbers by reporters, he just smiled and laughed.
"I haven't seen that poll," he said.
If there is anyone working hardest to rewrite the script for the embarrassed US government it's the military, which so far has mounted a remarkably efficient airlift from Kabul.
The latest figures showed US aircraft had evacuated more than 37,000 people just since August 14 and 42,000 since July.
Biden, who was uncharacteristically terse in the first days of the evacuation, seems to have regained his famed ability to express emotion, using this to praise the US military effort while sharing empathy for suffering evacuees.
"An incredible operation," he said Sunday.
But mixed with patriotism and empathy is a newer element: tough love.
Biden's argument is that, yes, there may be a mess but a mess is inevitable when you exit a civil war -- and exiting is the only goal that really matters.
"The evacuation of thousands of people from Kabul is going to be hard and painful no matter when it started and when we began," he said.
"There is no way to evacuate this many people without pain and loss, of heartbreaking images you see on television. It's just a fact. My heart aches for those people you see."
Biden says he is confident in the long-term outcome of the drama. But time may not be on his side.
In the most immediate sense he is racing to complete the mass evacuations by an August 31 deadline agreed with the Taliban, who are effectively standing back to allow their enemy to get out.
And the clock is running down on Biden's ability to steer the political ship in a town where his opponents are circling and his allies are nervous.
A pair of giant infrastructure spending packages that were meant to be the legislative crown jewels of the first term are now on hold while Democratic congressional leaders continue to try to ensure enough votes in the closely divided House of Representatives.
And just a little further on the horizon looms the potentially game-changing test of the midterm elections when the Democrats may well lose even the narrow majorities they now hold in Congress.
