>>This would be enforced how

Bingo. The flaw in the constitution. The Executive holds the only enforcement mechanism in government: the FBI, military and other police forces.

Having majored in political science as an undergrad and then being a trial attorney for 40+ years, I would argue that my use of the word 'flaw' is probably misplaced. 'Flaw' implies it could (should) have been created differently.

Alas, I am unaware of ever reading a workable way to 'fix' our constitutional 'flaw'.