CEIMN report cited in the American Prospect.
"A study by the Citizens for Election Integrity Minnesota found that the total costs of the amendment—spread over the state and local governments and individuals—would range from $52 million to $150 million. 'It was really an explosive strategy to shift the debate and say this is not about civil rights,' says David Schultz, who co-authored the study, 'but that this is about costs.'"