Earlier this fall, one of Joe Biden’s closest aides felt compelled to tell the president a hard truth about Kamala Harris’s run for the presidency: “You have more to lose than she does.” And now he’s lost it. Joe Biden cannot escape the fact that his four years in office paved the way for the return of Donald Trump. This is his legacy. Everything else is an asterisk.

In the hours after Harris’s defeat, I called and texted members of Biden’s inner circle to hear their postmortems of the campaign. They sounded as deflated as the rest of the Democratic elite. They also had a worry of their own: Members of Biden’s clan continue to stoke the delusion that its paterfamilias would have won the election, and some of his advisers feared that he might publicly voice that deeply misguided view.

Although the Biden advisers I spoke with were reluctant to say anything negative about Harris as a candidate, they did level critiques of her campaign, based on the months they’d spent strategizing in anticipation of the election. Embedded in their autopsies was their own unstated faith that they could have done better.

One critique holds that Harris lost because she abandoned her most potent attack. Harris began the campaign portraying Trump as a stooge of corporate interests—and touted herself as a relentless scourge of Big Business. During the Democratic National Convention, speaker after speaker inveighed against Trump’s oligarchical allegiances. Representative Alexandria Ocasio-Cortez of New York bellowed, “We have to help her win, because we know that Donald Trump would sell this country for a dollar if it meant lining his own pockets and greasing the palms of his Wall Street friends.”

[David A. Graham: What Trump understood, and Harris did not]

While Harris was stuck defending the Biden economy, and hobbled by lingering anger over inflation, attacking Big Business allowed her to go on the offense. Then, quite suddenly, this strain of populism disappeared. One Biden aide told me that Harris steered away from such hard-edged messaging at the urging of her brother-in-law, Tony West, Uber’s chief legal officer. (West did not immediately respond to a request for comment.) To win the support of CEOs, Harris jettisoned a strong argument that deflected attention from one of her weakest issues. Instead, the campaign elevated Mark Cuban as one of its chief surrogates, the very sort of rich guy she had recently attacked.

[Annie Lowrey: Voters wanted lower prices at any cost]

Another Bidenland critique takes Harris to task for failing to navigate the backlash against identity politics. Not that Harris ran a “woke” campaign. To the contrary, she bathed herself in patriotism. She presented herself as a prosecutor, a friend of law enforcement, and a proud gun owner. But she failed to respond to the ubiquitous ads the Trump campaign ran claiming that Harris supports sex-change operations for prisoners. She allowed Trump to create the impression that she favored the most radical version of transgender rights.

Biden, allies say, never would have let such attacks stand. He would have clearly rejected the idea of trans women competing in women’s sports. Of course, he never staked out that position in his presidency. But it’s true that Harris avoided the issue, rather than rebutting it, despite the millions of dollars poured into those attack ads. And in the end, those ads very likely implanted the notion that Harris wasn’t the cultural centrist she appeared to be.

A sour irony haunts Biden aides. In the coming months, Trump will use executive power and unified control of Washington to wreck many of the administration’s proudest accomplishments. But the ones he doesn’t wreck, he will claim as his own. Biden helped build the foundations for economic growth, with the Inflation Reduction Act, the CHIPS Act, and the infrastructure bill. Because the investments enabled by all three of those bills will take years to bear fruit, Biden never had the chance to reap the harvest. Despite Trump’s opposition to those pieces of legislation, the benefits of those bills could bolster his presidency. Biden will have passed along his most substantive legacy as a gift to his successor.