[n4r9]

The UK's recent prime minister Boris Johnson was born in the US two British parents who happened to be studying in Manhatten at the time. They all moved back here a few months later. The idea that he could be some sort of US sleeper agent is hilarious, though.

[eru]

Well, formally the Prime Minister is just some random bloke appointed by king to help him run the country. The PM doesn't even need to be a member of parliament!

Now the king, that guy can't even be catholic! And until recently, couldn't even be female with living brothers.

[n4r9]

Tradition does dictate that the PM is an MP, and tradition in UK parliament is pretty binding. However, an MP does not even need to be a British citizen: an Irish or a Commonwealth citizen can become an MP and go on to command the confidence of the house.

[eru]

> Tradition does dictate that the PM is an MP, and tradition in UK parliament is pretty binding.

I hope it stays that way.

The US had pretty strong traditions in politics, too, but they are increasingly being eroded.

To give an example that's hopefully far enough in the past to be non-controversial: when they banned alcohol in the early 1920s, they felt that their constitution did not already explicitly give their federal government the power to do so. So they passed the 18th amendment to give the feds that power to specifically ban alcohol.

Decades later, in the context of the war on drugs, everybody seems to take it for granted that the federal government can obviously ban arbitrary substances.