It would be a total disaster if he did that. The MSM and the Dems would portray him as some Banana Republic dictator.
You don’t have your head screwed on right.
The court said the EO was wrong but never ruled on the law. The law then stands and Trump can refuse the court order as it never questioned the Constitutionality of the law.
The court cannot order a law to be ignored without first overturning the law.
Also, as we are seeing, the Federal Court and the 9th Circuit Court do not have any authority in this issue. Only the US Supreme Court does.
Trump doesn’t have to listen to rulings about immigration law from local traffic courts, either.