This is nonsense.
The congress and president have done this since before the Barbary Wars.
It’s been approved by the authors and ratifiers of the constitution and there is no higher authority.
Of course there’s no telling what the Supreme Court will do.
Only Congress and a State can enter into War. A President has no authority in 'war', except in following the dictates of Congress.
Congress, the Pres and the rest should be removed from office.