About half of the 11 million undocumented workers in the U.S. work in agriculture. Undocumented immigrants make up a lot of the people who pick your lettuce, strawberries, oranges and artichokes and feed the chickens that end up on your dinner table. But with the Trump administration’s focus on deportation and shutting down the border, finding people to do that work is getting harder. It’s causing problems for many of California’s farmers.