It is the premise for suspending the Posse Comitatus Act.
It will be immediately challenged and stopped by the 9th Cir. and will proceed to the SC.
With all of the National Emergencies Declared in EOs and that we are still at war (legally), the SC will uphold the EO or it will be changed to comply.
The caravan is the excuse to all the military to execute the arrests.
IMO