KCRG-TV: Thousands of workers in the University of Iowa Healthcare system have voted to recertify their unions by a wide margin, according to information released by union leaders on Tuesday. Just over 10,400 of the employees and graduate workers are represented by three service unions, and each of them was recertified by over 99% of their voting members in recent votes. The recertification vote was required by a state law passed in 2017, where a majority of the total number of workers represented by the union, not just a majority of participating voters, must approve of the recertification.