Those who oppose a constitutional requirement that Minnesotans present a photo ID to vote like to argue that voter fraud is too rare to worry about. These opponents are primarily Democrats and liberals, including Gov. Mark Dayton. To us, their standard seems pretty weak and contradictory, given the fact that in any other public policy question, they favor government intervention. What's their line? "Even if this [insert issue here] affects only one person, that's one person too many." Right?