Ho-Yin Mo walked into Harry Reid International Airport in Las Vegas to catch a commercial flight. He walked out in ICE custody. Mo is — or was — a field representative for California State Assemblymember Catherine Stefani, a San Francisco Democrat who represents parts of San Mateo County.
The man who helped a Democrat legislator connect with constituents couldn't get through the airport Democrats once insisted should let anyone fly without documentation.
Mo entered the United States legally in January 2020 through Los Angeles International Airport on a temporary visa. His required departure date was May 15, 2020. He didn't leave. For over six years, Mo remained in the country past his visa expiration, and in January 2025 he joined Stefani's legislative staff. Before that, he'd worked as a news anchor and served as an organizer for Asian American and Pacific Islander voters on London Breed's 2024 mayoral reelection campaign in San Francisco.
The arrest was made possible by a policy shift that the Trump administration implemented after taking office — reversing what DHS described as "the horrendous Biden-era policy that allowed aliens in our country illegally to jet around our country." Under the previous administration, flying domestically without proper immigration status wasn't a problem. Under the current one, boarding a commercial flight means passing through a system that can flag an overstayed visa. Mo flagged.
Bill Essayli, First Assistant U.S. Attorney for the Central District of California, didn't leave much room for interpretation. "No one is above the law," Essayli said, "not even the California legislature and its staff."
Stefani's response went in a different direction. "My message today is simple: I am respectfully calling for Ho Yin Mo's release as soon as possible," she said. She called Mo "a selfless public servant and a valued, legal employee." She added, "When Mo and I meet our Chinese-American constituents, he brings a unique sense of belonging." She concluded: "Our whole community eagerly awaits Mo's return to his home and his job where he is loved and adored."
A valued, legal employee. DHS addressed that characterization directly, "work authorization or a pending application do NOT confer legal status in the United States." Having a job — even a government job — doesn't erase an overstayed visa from 2020.
Stefani represents San Francisco, a city that declared itself a sanctuary jurisdiction specifically to shield people from the enforcement action that just removed her own staffer. The policy position is that immigration enforcement is cruel and unjust. The staffing decision suggests the position is more personal than principled.
Mo's visa expired May 15, 2020. He was detained September 2026. That's six years and four months between the date he was supposed to leave and the date the system caught up with him.
He got caught at the airport. The same system Democrats tried to dismantle is the one that worked.