But the A. Philip Randolph Institute, an African-American trade union group, the Northeast Ohio Coalition for the Homeless, and Larry Harmon, a man who was purged from the rolls, are suing the state over the law. They argue that the law says each voter “has the right not to cast a vote — and the mere exercise of that right should not be the basis for removal from the voter rolls.” Ohio law would then, they argue, violate the law by removing someone’s registration with no evidence that they have actually moved addresses. The lawsuit was initially filed on their behalf by the American Civil Liberties Union of Ohio and Demos, a liberal think tank that works on election reform.