Trump's answer exposed quite a lot about who he really is. He is toast.
The SCOTUS ruling. Whether through judicial activism, legislating from the court, through flat out abuse of power, this is the law of the land now.
Until it is countered by Congress or in some way re-evaluated by the SCOTUS itself, this is something we live with now.
If the federal courts are going to uphold it, there’s not much we can do about it. It is effectively the law.
We don’t have to agree, but it will be implemented against us.