U.S. farm industry groups want President-elect Donald Trump to spare their sector from his promise of mass deportations, which could upend a food supply chain heavily dependent on immigrants in the United States illegally.

So far Trump officials have not committed to any exemptions, according to interviews with farm and worker groups and Trump's incoming "border czar" Tom Homan.

Nearly half of the nation's approximately 2 million farm workers lack legal status, according to the departments of Labor and Agriculture, as well as many dairy and meatpacking workers...

Homan has said immigration enforcement will focus on criminals and people with final deportation orders but that no immigrant in the U.S. illegally will be exempt...

Mass removal of farm workers would shock the food supply chain and drive consumer grocery prices higher, said David Ortega, a professor of food economics and policy at Michigan State University...

"They're filling critical roles that many U.S.-born workers are either unable or unwilling to perform," Ortega said.

Farm groups and Republican allies are encouraged by the incoming administration's stated focus on criminals.

Dave Puglia, president and CEO of Western Growers, which represents produce farmers, said the group supports that approach and is concerned about impacts to the farm sector if a deportation plan was targeted at farmworkers...