^The states really delegate a small number of powers to the federal government, things like murder and abortion aren't among those. This is really the way it was supposed to be and Roe vs Wade was a mistake that undermined the legitimacy of the Supreme Court. So delegation is really the wrong word for this but a surprising number of people here seem to have almost no understanding of American civics.
EDIT, I'm out of quota, here's my reply to https://news.ycombinator.com/item?id=31304544 :
> How do you know it won't be made illegal?
This ruling says the federal government has no say in abortion rights. That prevents the federal government from legislating on it. It actually protects your rights from populist right wing mobs on the other side of the continent.
> Why do you assert that it was never under the mandate of the federal government? Obviously it's a contended issue.
All of the powers the federal government has are delegated to it in the Constitution. Show me where this one is.
>- why do you assert anyone who disagree with you is ignorant? Perhaps they listen to the very loud lobby of anti abortion goals, and view this milestone as part of a trend and extrapolate?
Regardless of how they got confused it's not an accurate view of how American government works and thinking that way is harmful to both sides
EDIT 2, my reply to https://news.ycombinator.com/item?id=31304674:
>Here are 13 states that have "trigger laws"
Right, the population there wants it banned, the population in California does not. Now both groups get what they want. It won't be banned in California and, in fact, this ruling makes it harder for republicans to ban it in states like California. This protects your rights if you live in a liberal state.