Former President Donald Trump visits the border in Montezuma Pass, Arizona, Augusst 2024.Olivier Touron/Getty Images/Grist

This story was originally published by Grist and is reproduced here as part of the Climate Desk collaboration.

As Republican presidential nominee Donald Trump campaigns for a second term in the White House, the former president has repeatedly promised to enact the largest deportation of undocumented immigrants in US history. It’s a bold threat that legal experts say should be taken seriously, despite the significant technical and logistical challenges posed by deporting 11 million people from the United States.

Even if only somewhat successful, Trump’s hard-line approach to immigration—with its laser focus on removing immigrants who live in the US without permanent legal status—has the potential to uproot countless communities and families by conducting sweeping raids and placing people in detention centers.

Mass deportation would also, according to economists, labor groups, and immigration advocates, threaten the economy and disrupt the food supply chain, which is reliant on many forms of migrant labor.

The ramifications of a mass deportation operation would be “huge” given “immigrant participation in our labor force,” said Amy Liebman, chief program officer of workers, environment, and climate at the Migrant Clinicians Network, a nonprofit that advocates for health justice. Immigration is one of the reasons behind growth in the labor force, said Liebman. “And then you look at food, and farms.”

“Button your seatbelts, people, because who’s washing dishes in the restaurant, who’s freaking processing that chicken? Like, hello?”

The possibility of deportation-related disruption comes at a time when the US food system is already being battered by climate change. Extreme weather and climate disasters are disrupting supply chains, while longer-term warming trends are affecting agricultural productivity. Although inflation is currently cooling, higher food costs remain an issue for consumers across the country—and economists have found that even a forecast of extreme weather can cause grocery store prices to rise.

Mass deportation could create more chaos, because the role of immigrants in the American food system is difficult to overstate. Every year, hundreds of thousands of people, the vast majority of them coming from Mexico, legally obtain H-2A visas that allow them to enter the US as seasonal agricultural workers and then return home when the harvest is done. But people living in the US without legal status also play a crucial role in the economy: During the pandemic, it was estimated that 5 million essential workers were undocumented. And the Center for American Progress found that nearly 1.7 million undocumented workers labor in some part of the US food supply chain.

A stunning half of those immigrants work in restaurants, where during the height of the COVID-19 pandemic, they labored in enclosed, often cramped environments at a time when poor ventilation could be deadly. Hundreds of thousands also work in farming and agriculture—where they might work in the........

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