John Rosenow, a fifth-generation farmer in Waumandee, Wisconsin, owns more than 900 acres and over 600 dairy cows. He said about 90% of the work on the farm is done by immigrants.
Those immigrants include Kevin, who was born in central Mexico and crossed the U.S. southern border illegally when he was 18. Now 21, Kevin, who did not provide his last name during an interview with CBS News, is among the 11 million undocumented migrants living in the U.S. More than 10,000 of them work on Wisconsin dairy farms, according to a report by the University of Wisconsin-Madison.