He's a British citizen. He would like to travel to or through America without - in essence - renouncing his British Citizenship. As he is a Conservative Member of Parliament this would put a serious crimp in his dayjob.
We hate the idea of anchor babies, but when a British citizen wants to end his anchor baby status, we throw a fit? This guy shouldn’t have to renounce anything because he shouldn’t be a citizen just because he dropped on our soil. Those born to non-citizens on our soil should have to apply for citizenship just like any other alien. I’m guessing this guy would not have applied, and I have no problem with that.