For those of you just coming to the case, this is from my earlier recap:
In their complaint, the states [including Texas and other red states] point out (rightly) that the Supreme Court upheld the ACA in NFIB v. Sebelius only because the individual mandate was a tax and (rightly) that Congress has now repealed the penalty for going without insurance. As the states see it, the freestanding requirement to get insurance, which is still on the books, is therefore unconstitutional. Because it’s unconstitutional, the courts must invalidate the entire ACA—lock, stock, and barrel.