Queen Elizabeth II (or I, if you’re Scottish) is one of the most powerful people in the world. She can dissolve Parliament on a whim, declare war, revoke passports, and commit just about any act that would be a crime to anyone else with no consequences.
This may surprise you, given that she never does any of these things. Yet the main reason why the monarch of the UK still holds all these powers, what with the Magna Carta and Commonwealth and other historical tidbits, is a simple one. She absolutely never uses them. If she did, you can bet the UK would become a Republic faster than you could sing, “Rule, Britannia.”
This may seem like a rhetorical point, even with Brexit turning far further South than the Treaty of Rome ever enabled. But we’re about to see this principle in action. Not in the UK, but here in the US.