Good morning.

(Want to get California Today by email? Here’s the sign-up.)

Let’s turn it over to Thomas Fuller, our San Francisco bureau chief, for today’s introduction.

It will be many months before any grapes are ready to pick but winemakers in the Napa and Sonoma valleys are already fretting that they will not have enough workers for the harvest.

“I’m super-worried about it this year,” said Nico Cueva, winemaker at Kosta Browne, a high-end winemaker in Sonoma County. “Our industry is based on immigration.”

More than two-thirds of California farmworkers are undocumented immigrants and the Trump Administration’s threatened crackdown is scaring many of them away, winemakers say.