Federal immigration officers arrested a California Democratic lawmaker’s staffer at the Las Vegas airport after the Department of Homeland Security said he had remained in the United States nearly six years beyond his authorized stay.

Ho-Yin Mo, a field representative for Assemblywoman Catherine Stefani, was taken into custody at Harry Reid International Airport. Before joining the Legislature, Mo worked as an anchor and reporter for a Chinese-language television station in San Francisco and as an outreach organizer for former Mayor London Breed’s unsuccessful 2024 reelection campaign.

The arrest has already produced the familiar California response: treat federal immigration law as optional, describe enforcement as cruelty, and demand an exception for someone connected to Democratic political power.

DHS gave a much simpler account. The department said Mo entered the country lawfully on January 13, 2020, on a temporary basis but was required to leave by May 15 of that year.

The central facts moved quickly across X after the arrest became public.

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Fox News reports that Mo joined Stefani’s office in January 2025 and worked as a field representative serving parts of San Francisco and San Mateo County. DHS said that a work permit or pending immigration application does not itself provide lawful immigration status.

The department tied the airport arrest to its reversal of a Biden-era practice that had allowed people allegedly in the country illegally to fly domestically without being taken into custody. Mo is expected to remain detained while removal proceedings move forward.

That distinction between permission to work and permission to remain in the country is the heart of the dispute.

Stefani called Mo a “valued, legal employee” of the Legislature and demanded his release. But being legally eligible for a job is not the same question as having lawful immigration status.

One concerns employment authorization. The other concerns whether a person is authorized to remain in the United States.

If DHS’s timeline is correct, Mo did not become immune from enforcement because a politician hired him, because he served constituents, or because he once appeared on television.

First Assistant U.S. Attorney Bill Essayli made that point in one sentence.

The San Francisco Standard reports that Mo is a Hong Kong native and was being held at the Nevada Southern Detention Center in Pahrump. Stefani said he helped constituents obtain health coverage, child care and food assistance, and argued that his work had made him an important link to Chinese-American residents.

The local report also noted that Mo graduated from the University of California, Berkeley, and had worked in Bay Area media before entering politics.

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Those details may explain why Stefani values him. They do not resolve the federal government’s immigration-status allegation.

The rule of law becomes meaningless if professional credentials and political connections operate as a private exemption system. Millions of people wait, file paperwork and follow the legal immigration process.

They are entitled to expect that the government will not create a second set of rules for well-connected insiders.

Stefani’s call for release was nevertheless an important part of the story, and current coverage carried her defense of Mo alongside the federal allegations.

Patch reports that Stefani described Mo as a selfless public servant whose work helped Bay Area residents obtain health coverage, child care and food assistance. She said he was authorized to work in the United States and urged federal officials to release him.

DHS answered that neither a pending application nor work authorization confers lawful immigration status. Mo remains in federal custody while his immigration case proceeds, leaving an immigration judge—not a press release or political demand—to decide the legal questions.

That is how the process should work. Mo is entitled to present his case, challenge the government’s allegations and receive the process provided by immigration law.

But due process does not mean automatic release, and it does not mean ICE must ignore a person at an airport because his employer holds elected office.

The political contrast is hard to miss. California officials regularly insist that ordinary citizens must obey an expanding catalogue of state rules.

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Yet when federal law reaches into their own offices, enforcement is suddenly portrayed as illegitimate.

President Trump’s immigration mandate was not limited to people without résumés, degrees or political connections. The policy is that the immigration laws apply to everyone.

Mo’s case will now be tested in the legal system. If DHS is wrong about his status, the government should correct the error.

If the department is right, his position in the California Legislature should not buy him a pass unavailable to everyone else.

Essayli had it right: no one is above the law.

 

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