Let the Governors declare they won't follow such unConstitutional edicts, as they are now in lawsuits. What's the Fedgov going to do? Send the National Guard to enforce by threat of death? Hardly.
Does anyone really believe that in this day anyone has the stomach for a civil war initiated by the Fedgov against States' Rights? The States can just say NO and get on with their own business. The Fedgov socialist/commies would just whine, but yet neutered.
A few non-reasoning Freeps actually do believe that. I've debated with several who are convinced that fedzilla would unleash the full might of the U.S. military upon any state that chose to peacefully secede from the union.
This, despite the fact that dozens of new countries have formed since the end of WWII through means of peaceful secession.
No, for some reason, the U.S. is one of the only countries on earth that would break with modern convention, and attempt to subjugate a people through force, who have chosen to form their own nation.