It need not become a constitutional crisis. All that is necessary, according to Article 3 of the US Constitution, is for Congress to restrict the appellate jurisdiction of the Courts. Congress can, and did so up until the last third of the 19th century. Time to dust off that old document, the Constitution that is, and abide by its provisions. Simple enough. Case closed.
“All that is necessary, according to Article 3 of the US Constitution, is for Congress to restrict the appellate jurisdiction of the Courts.”
(That is also a way to allow states to retain their own abortion laws, gay marriage laws, etc. But the GOPe Congress has never had the stones.)