Boris Johnson among record number to renounce American citizenship in 2016
Johnson was born in New York when his parents worked there, but has not lived there since he was five years old. His decision does not appear to be an attempt to distance himself from the politics of Donald Trump, but may instead be a move to ensure he is out of reach of America’s Internal Revenue Service (IRS).
https://www.theguardian.com/politics/2017/feb/08/boris-johnson-renounces-us-citizenship-record-2016-uk-foreign-secretary
...American citizen because he was born here. Hasn't lived here since he was 5. Sold his house in England and got hit for $50,000 or so in taxes by IRS.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!