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Jeffrey, thanks for the condescension, but the issue is not taking minors across state lines. (Last I checked, abortion clinics were kinda down on kidnapping.) It's about what happens when they go on their own. Those in states with more restrictive notification laws lose the option to go another state. Adding delays, making doctors adhere to notification standards that their own state doesn't require them to--these are additional obstacles to what is a legal procedure.
As for the underground railroad analogy: it's more the notion of leaving a state where something is criminalized for one where it is legalized. I don't think the words "the new slavery" appeared in the original piece. But I have to ask: is that the standard? Does something really have to be as bad as a centuries-long atrocity in order for us to have a right to object? Please, just let us know what the threshold is.