Which does what, limit his wife’s options should she wish to divorce? The kids would be US citizens anyway, they technically could be drafted.
One was born in the U.S., the other was not (if the stories we’ve been told about the births are even true.) I’m not sure how the formal citizenship would be decided by the parents in a case like that, but since they are both in the line of succession (6th and 7th), I would imagine they’re considered British citizens.
But, yes, the opinion of one person I heard commenting on this was that the U.K. laws would give more consideration to the father in a divorce than the American ones would.
Of course, there was probably more than one reason for the move. These two have a host of problems.
I forgot about dual citizenship. Parents can’t renounce that on behalf of minors; but the child can renounce it himself, even before the age of 18 in some cases.