Aside from the obvious
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Since states can still allow abortions, this means that a lot liberals will fuck off right back to their blue states (God-willing).
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It's not enough for states to ban abortions, though; they must criminalize it, because people are already talking about driving over state lines, getting an abortion, and then coming right back. Criminalizing it means that the person will be wanted in that state, and at the very least, cannot return. This should help make it that liberals MOVE out of red states altogether.
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Men and women will be more conscious about having unprotected sex. Hopefully, they'll look for serious relationships that will lead to marriage (won't hold my breath, though). Overall, it should lead to less degeneracy.
Stupid, contrived example since no state would ever legalize murder.
You're a dumbass who doesn't know how jurisdiction works. The location of the murder is not the sole ground for jurisdiction. ANY state where ANY part of the murder was planned would be included, so you could be charged in your home state. You could also be charged federally. I've seen cases where people go to OTHER COUNTRIES to kill their partner, and then they come back and get charged with murder in the US.
Ummmmmm, the whole point of this thread is that the Supreme Court ruled that states don't HAVE to legalize murder.
Now, it's up to the states whether or not to keep murder legal or write laws against it.