The quiet technocrat who steered Biden’s effort to tighten the border

Of interest:

The lead architect of President Joe Biden’s border strategy is not Vice President Kamala Harris, despite persistent Republican claims to the contrary. That role belongs to a bookish, little-known policy adviser named Blas Nuñez-Neto.

A data-driven technocrat, Nuñez-Neto has helped engineer Biden’s pivot toward tougher border enforcement and sweeping restrictions on asylum — moves that contributed to a nearly 80 percent drop in illegal crossings since December.

The transformation is shoring up one of Democrats’ biggest vulnerabilities ahead of the Nov. 5 presidential election and potentially defusing a top-polling issue for Republican nominee Donald Trump. After three years of record crossings, the U.S.-Mexico border is quieter and more controlled today than at any point since late 2020, before Trump left office.

Nuñez-Neto pulled that off by steering the administration back to a border policy framework Democrats used to embrace more easily, according to current and former administration officials. The formula: Be generous and welcoming to immigrants seeking to come lawfully, but stingy and firm with those who don’t.

The White House declined to make Nuñez-Neto available for an interview. Biden officials said the administration’s border policy moves have been shaped by senior White House officials and Homeland Security Secretary Alejandro Mayorkas, whom Nuñez-Neto worked for before being promoted to the White House in June.

In a statement, White House spokesperson Angelo Fernández Hernández said Biden “believes it is a false choice to say we have to walk away from being an America that embraces immigration in order to secure our border.”

“We must enforce our laws at the border and deliver consequences to those who do not have a legal basis to remain in the United States, and we must expand lawful pathways,” Fernández Hernández said.

Southwest border apprehensions by month

Illegal crossings at the U.S.-Mexico border have declined in 2024, according to U.S. Customs and Border Protection data.

Nuñez-Neto’s policy approach embodies the political calculus that while most Americans remain favorably disposed toward immigrants, few things erode the welcoming spirit faster than an out-of-control border. The growing U.S. economy needs workers, too, and immigrants help offset declining U.S. birth rates. But how they arrive matters.

Relying heavily on the president’s executive powers to grant entry using an authority known as parole, the Biden administration has been allowing nearly 75,000 migrants to enter each month through legal channels.

Republican critics denounce those pathways as a “shell game,” arguing the administration is facilitating mass migration through doors that should not be opened in the first place. But the expansion — paired with the most severe restrictions on asylum eligibility at the border from a Democratic administration in decades — has corralled the disorder.

Trump has largely ignored the change, displaying at his rallies a chart that shows record illegal crossings during Biden’s first three years and cuts out data showing the 2024 decline. He continues to label Harris, his Democratic opponent in the upcoming election, as the “border czar,” though she never held such a role. Biden tasked Harris with leading the administration’s plan to reduce Central American emigration by promoting investment and job creation, not to deal with immigration enforcement at the southern border.

That task — arguably one of the least-desirable in a Democratic administration — would become Nuñez-Neto’s.

A change in direction

The Argentine-born Nuñez-Neto was working on border security issues at the Rand Corporation in early 2021 when DHS policy adviser David Shahoulian — one of the few voices in the administration urging tougher measures at the border — recommended him for a job. He became chief operating officer for U.S. Customs and Border Protection.

Trump’s rhetoric and harsh policies in the White House had galvanized immigration advocacy groups and many Democrats against enforcement and the very idea of deterrence as an element of border security. Biden loosened restrictions, fueling a perception that the border was more open even as officials — including Harris — told would-be migrants “do not come.”

Shahoulian soon left the administration in frustration. In late 2021, Nuñez-Neto took over his role shaping border policy at DHS.

More than a year later, as the administration ended the pandemic-era Title 42 border restrictions, Biden officials increasingly sought help from Mexico, Panama and other nations in the region to help contain migration and cooperate with U.S. policies. Nuñez-Neto took on a second role as DHS’s top international envoy. He became a major diplomatic asset: a bilingual U.S. official capable of explaining policy to Spanish-language media and speaking directly to Latin American officials.

Nuñez-Neto developed an especially close partnership with Roberto Velasco, the top official at Mexico’s Foreign Ministry for North American affairs, according to current and former senior officials from both nations. Mexican authorities this year have arrested record numbers of migrants traveling through the country toward the U.S. border, a crackdown that Biden officials credit with sharply curtailing illegal crossings.

Angela Kelley, a senior adviser at DHS until June 2022, said the Biden administration has worked to craft a careful balance of incentives and penalties — carrots and sticks. She had been a longtime advocate for asylum seekers, and worked to resist Trump’s policies. Nuñez-Neto was laser-focused on border crossings, checking enforcement data daily.

“He’s more of a sticks guy, given his background,” said Kelley, now chief policy adviser at the American Immigration Lawyers Association.

Nuñez-Neto was promoted to the White House as the president announced strict new emergency measures that have upended decades of asylum law, closing the border when crossings are high and essentially barring access to U.S. courts for migrants who enter the country illegally.

The restrictions were made possible by a breakthrough agreement Nuñez-Neto helped negotiate with Velasco and other senior Mexican officials. It allows the United States to return large numbers of non-Mexican migrants back across the border — a crucial tool for agencies that have struggled to send deportees to Venezuela and other nations whose relations with Washington are strained.

As the deterrence policies took shape, the number of migrants released into the United States with a pending asylum claim — the procedure decried as “catch and release” — plummeted. It was Nuñez-Neto, not someone from Harris’s team, who fielded questions about the measures from reporters and on Capitol Hill.

“Those of us who follow the inside baseball of immigration know he’s the person that has become the de facto border czar,” said one policy adviser close to the administration who spoke on the condition of anonymity to describe informal conversations with top officials.

Nuñez-Neto has done so with a quiet, disciplined manner that is the stylistic opposite of swaggering Trump-era border officials. Some immigration advocates and activists have come to view him with scorn, as a border-cop-in-sheep’s-clothing who speaks of migrants sympathetically while orchestrating the kind of crackdown immigration hard-liners have only dreamed of.

The sharp drop in illegal crossings has allowed the Harris campaign to go on offense. She blames Trump for sinking a bipartisan Senate bill last winter that would have provided billions in new funding for more border agents, detention capacity, deportation flights and other enforcement tools. She has called for Congress to pass the bill, and says she would sign it into law if she’s elected.

But several of its toughest provisions — in particular the emergency asylum restrictions — are already in place…

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