A “black swan event” could be on the horizon without more legal immigrants to satisfy a labor shortage, according to the CEO of an American agricultural cooperative. Land O’Lakes CEO Beth Ford sounded the alarm at the Fortune Most Powerful Women (MPW) Summit on Tuesday. Ford noted the precarious position faced by American farmers, including a labor shortage due to the Trump administration’s harsh immigration measures. “These are folks who oftentimes try to get American labor [but] are struggling