In California’s Central Valley, America’s most productive food-producing region, there is widespread fear of President Trump’s crackdown on undocumented immigrants.  Workers fear deportation, breaking families apart; farmers wonder who will harvest their crops.  Journalist Lauren Markham has talked with the migrants and their bosses.  But so far, most ICE raids have been in Southern California.  Will campaign contributions and personal relationships to Trump staffers add up to protection for workers and an industry in peril?