What would be grammatically correct? Would I need to use 's after "Supreme Court"?
...overruled a prior decision of the Supreme Court, defined in the...
or
...overruled a prior decision of the Supreme Court's, defined in the...
...I know I can structure the sentence in a better format as so:
...overruled a prior decision made by the Supreme Court, defined in the...
However, I want to know which one from the first two is correct.
The complete sentence would've been helpful, but still, here you go:
...overruled a prior decision of the Supreme Court, defined in the...
Here you are using decision of the Supreme Court, so no 's required, and the sentence is correct.
...overruled a prior decision of the Supreme Court's, defined in the...
Here you are using the same of, so the 's is unnecessary. If you do want to use the 's, you have to remove the of, like:
...overruled the Supreme Court's prior decision
But as you can see, this changes the meaning of the sentence slightly. It no longer talks about a certain decision made by the Supreme Court, which was the intention of your original sentence, to begin with.
