Chobani CEO Hamdi Ulukaya is urging the Trump administration to reconsider its hardline approach toward immigration, as he warned Tuesday that the country's food supply chain is being threatened by aggressive nationwide enforcement raids. "We need to be very realistic," Ulukaya said at the Wall Street Journal's Global Food Forum in Chicago. "We need immigration, and we need workers for our food system to work." The yogurt maker's stark warning comes amid escalating immigration raids that "have rattled food and agriculture companies in recent weeks," the Journal reported Tuesday.