Oh I think Trump has the constitution on his side.
The court won't decide on the wall but on whether or not Trump has the right to declare a National Emergency and he does.
Congress has already said its an emergency and funded over a billion dollars to deal with the emergency. This will be an easy win for Trump in the SCOTUS.
Then they will be legislating from the bench. Conservatives keep telling us how bad that is yet they may do it because of politics.