Legally or morally? Legally, I'm not a lawyer but I would guess not. Morally, he has to live with the decision he made oh and legally too since renouncing US citizenship is permanent (as far as I can understand the government site I read).
I was referring to the tax question at the heart of the debate. I'm not the most articulate person, perhaps moral is not the best or most appropriate word but it doesn't feel that far off.
