This is Part 1 of a four-part series on the origins of the border crisis: Read Part 2, Part 3, Part 4.
During President Joe Biden’s term, Border Patrol arrested an unprecedented number of immigrants who crossed illegally into the United States. Many believe Biden caused this increase in migration by reducing border enforcement. However, data obtained by the Cato Institute through the Freedom of Information Act (FOIA) challenges this narrative. In fact, the border crisis began before Biden took office and ended before he left.
From his administration’s first day in January 2021, Biden actually increased border enforcement—arrests, detentions, and removals of border crossers all increased. The prevailing narrative that blames Biden overlooks the real causes of the crisis: America’s robust labor market and bad immigration policies that incentivized illegal entries. However, Trump, not Biden, mostly started those policies. Biden eventually phased out some of them; he increased legal migration, and as the labor market cooled, the problem dissipated.
Summary
The main takeaways are:
Illegal immigration had already increased to a 21-year high before Biden entered office.
Biden immediately started increasing expulsions from his first day in office.
Biden tripled interior detention and increased border detention 12-fold.
Biden increased air removal flights by 55 percent over 2020 levels.
Biden negotiated broader expulsion deals with foreign countries than Trump.
Biden got many foreign countries to carry out crackdowns on illegal and legal migration.
Biden removed or expelled 3.3 million border crossers—three times as many as Trump.
Biden even managed to remove a similar percentage of crossers as Trump’s four years.
Despite Biden’s historic crackdown:
Expulsions did not deter migrants, even among demographics universally expelled.
The percentage increase in evasions of Border Patrol increased as much as Border Patrol arrests, implying that releases did not cause the crisis and that many people did not want Border Patrol to catch them but were undeterred by the threat.
Releases occurred not because Biden cut removals but because migration grew faster than the administration could increase them.
As a result, releases only occurred among specific demographic groups and in certain areas where removals were logistically complicated.
Biden could not easily remove groups to Mexico, like families, children, and immigrants from distant countries who were arrested in record numbers.
The actual causes of the increases in illegal immigration were:
Unprecedented labor demand, which incentivized and funded migration from around the world: From February 2021 to August 2024, there were more open jobs each month than in any month before Biden’s term began. During this time, economies worldwide were recovering far less quickly than the United States. As labor demand subsided in 2024, immigration fell.
Unprecedented access to information about migration through the Internet and social media: Internet access rose rapidly from 2018 to 2021, nearly doubling in Central America and reaching unprecedented highs in South America. Social media platforms gave people step-by-step instructions on migrating and connected them directly with smugglers. This opened migration from around the world, which contributed to the number of releases.
Novel and perverse enforcement policies: The Title 42 expulsion policy incentivized repeat crossings by returning people to Mexico, where they could immediately attempt to re-enter the United States. Title 42 also cut off access to asylum, incentivizing more Border Patrol evasions.
Novel and perverse legal migration policies: Title 42 not only banned asylum for people who crossed illegally but also prohibited legal entries by asylum seekers, including demographic groups that had traditionally always entered legally, like Haitians, Cubans, and Mexican families. Biden eventually increased legal entries by these groups and others, limiting the crisis’s extent and ultimately contributing to its end.
The border crisis did not end because Biden signed an executive order in June 2024. If he had signed his border executive order in 2021, it would have merely duplicated what Title 42 was already doing: ban asylum. Moreover, the border executive order did not significantly change the downward trend in arrivals in 2024, which had already fallen in half during the five months before he signed it. Finally, the order did not increase removals. Rather, the crisis primarily ended because labor demand subsided significantly and because Biden expanded legal migration.
Read Biden Didn’t Cause the Border Crisis, Part 2: Did Biden Cut Enforcement?