The Feds screwed over San Joaquin Valley farmers over this, IIRC, back during the Clinton Administration. There were towns so dependent on agriculture that unemployment shot up to 40% and families that had owned their farms for generations lost them. So this move by Trump and counter-move by Goobernor Nuisance could have electoral impact on races in the San Joaquin Valley and maybe the Sacramento Valley. Though probably not in the Sacramento-Davis area (bureaucrats and university students). And since much/most of CA's population is in the Land of LA, San Diego, Silicon Valley, and SF - folks whose awareness of agriculture doesn't go much beyond their grocery store - statewide races are not likely to be affected.
FWIW, my Dad was a farmer in Yolo County, 20-30 minutes' drive by county roads from Davis.