for voters who are registered in more than one state by comparing names and dates of birth. Researchers at Stanford University, the University of Pennsylvania, Harvard University, and Microsoft found that for every legitimate instance of double registration it finds, Crosscheck's algorithm returns approximately 200 false positives. Kobach has been repeatedly sued by the American Civil Liberties Union (ACLU) for trying to restrict voting rights in Kansas. See also Authoritarianism Democratization Electoral fraud Fascism Gerrymandering Political corruption Unfair election Vote equality Voter caging Voter registration Voter turnout Further reading Rick L. Hasen. 2020. Election Meltdown: Dirty Tricks, Distrust, and the Threat to American Democracy. Yale University Press. References External links Political campaign techniques Political corruption Electoral fraud Discrimination Injustice