Iowa’s Attorney General, Tom Miller, has joined 18 other attorneys general, six cities and the bipartisan U.S. Conference of Mayors in a lawsuit challenging the Trump administration’s demand for citizenship information in the 2020 decennial Census. These groups believe that demanding citizenship information would decrease Census participation, which would have a negative impact, threatening billions of dollars in federal funds for education, infrastructure, Medicaid and more. “We believe everyone should be counted,” Miller says. “Adding a citizenship question would undermine participation and accuracy.” The lawsuit was filed Tuesday morning in the U.S. District Court for the Southern District of New York.