Book Summary107 Days, by Kamala Harris

1-Page Summary1-Page Book Summary of 107 Days

Kamala Harris’s 107 Days (2025) is an account of her whirlwind 2024 presidential campaign and her argument as to why she lost to Donald Trump. Harris contends that the abbreviated timeline of her campaign—which gave her just over three months from when President Joe Biden withdrew from the race—made victory nearly impossible. She argues that 107 days was insufficient time for her to separate herself from an unpopular incumbent while doing the job of a sitting vice president—all while establishing an independent political identity and contending with her opponent’s advantages in money, media, and misinformation.

Harris wrote the book less than a year after her loss, with the help of Pulitzer Prize-winning novelist Geraldine Brooks. As the first woman, first Black woman, and first South Asian American to serve as vice president, and as someone who came within a few percentage points of becoming president herself, Harris has a unique perspective on the possibilities and limitations of American politics. The book arrived as Democrats debated whether Harris should be considered for future leadership roles, including another presidential run, and she addresses both supporters seeking to understand her loss and critics who question her campaign decisions and her viability as a candidate.

In this guide, we’ll explore Harris’s argument in three sections: First, we’ll discuss the constraints that set the conditions of her campaign: Biden’s decision to run for reelection, the way in which his team undermined her, and the 107-day timeline. Next, we’ll cover the choices she made given those...

107 Days Summary What Constraints Did Harris Face?

Harris contends that when Biden dropped out of the US presidential race on July 21, 2024—just 107 days before the election, and so late in the election cycle that Harris seemed the only practical choice to replace him—she inherited a candidacy compromised by three fatal constraints.

First, Biden’s administration had marginalized Harris for four years, preventing her from building the political capital she would need to successfully run for president. Second, Biden’s pursuit of reelection at age 81 created what Harris characterizes as a crisis for the Democratic Party that culminated in his late exit from the race. Third, the 107-day timeline wasn’t just short—it was, in Harris’s view, inadequate for her to establish her own political identity in Biden’s shadow while remaining Biden’s vice president. And, she writes, even after creating this situation, Biden continued to undermine her throughout the campaign itself.

Four Years of Being Undermined

Harris argues that long before her electoral sprint began, Biden’s White House spent years preventing her from building the political capital and independent public profile she would need to successfully run for...

107 Days Summary What Strategic Choices Did Harris Make?

Harris argues that given the constraints she faced, her strategic choices were not only defensible but arguably optimal. She couldn’t pursue an ideal campaign strategy. Instead, she had to make calculated decisions that balanced competing demands. In this section, we’ll explore how she handled these decisions—and how she argues the choices she made were both ethically necessary and politically unavoidable.

The Challenge of Remaining Loyal While Separating From Biden

Harris identifies her decision to stay loyal to Biden even as his unpopularity threatened to sink her candidacy as the most consequential choice of her campaign. Polling showed Biden’s approval rating around 41%, and Harris needed to convince voters that she would chart a different course. Yet she remained Biden’s vice president, and she argues that criticizing him publicly would have violated the trust necessary for that relationship. She also worried that distancing herself from Biden would alienate voters who appreciated Biden’s accomplishments in infrastructure legislation, prescription drug cost reductions, and clean energy investments. She maintains she couldn’t, in good conscience, elevate herself by...

107 Days Summary Why Did Harris’s Strategy Fail?

Harris argues that her campaign suffered not only because of the rushed timeframe and her party’s irreconcilable expectations, but also because Trump enjoyed a number of advantages that left her at a significant deficit. In this section, we’ll explore the upper hand Trump had in reaching voters, the key demographics that shifted away from Democrats, and why Harris believes the timeline made all these problems insurmountable.

Trump’s Advantages in Money and Media

Harris argues that Trump had the upper hand in reaching voters and shaping what they heard about the campaign. Tech billionaire Elon Musk spent at least $288 million supporting Trump. One example of how he used his influence was when he created a controversial million-dollar “sweepstakes” to drive traffic to his social media platform X, formerly Twitter, where he’d fired content moderators and fact-checkers, relentlessly promoted Trump, attacked Harris, and spread misinformation about the election. Harris suggests tactics like this may have decided the race in swing states, where Trump’s margins were razor-thin: less than 1% in Wisconsin, 1.44% in Michigan, and 1.73% in Pennsylvania.

**How Big an Effect Did...

Shortform Exercise: Navigate Impossible Constraints

Harris argues she faced irreconcilable constraints—she couldn’t be loyal to Biden but also separate from him, couldn’t introduce herself to voters while also defending the administration, and couldn’t build relationships slowly but also win quickly. While most of us won’t run for president, we often face situations where we’re constrained by competing demands, limited time, or loyalty to people or institutions that make our goals harder to achieve.

Think about a professional or personal challenge you’ve faced where you felt constrained—where the path forward was blocked by contradictory requirements or limited resources that made success seem impossible. What were the competing demands or constraints you were navigating? (For example, loyalty to your current employer versus pursuing a better opportunity, limited time for work and for family, or needing to establish your own identity while working in someone else’s shadow.)