My point is that in these troubled times, what whilst in the US visiting, the US gov't decides that all "foreign visitors" have to go and all US citizens have to stay? If I've entered as a US citizen and my husband has entered on his UK passport...
I know I'm sounding paranoid. But did anyone really think 3 years ago that we'd be where we are now security-wise?
Of course, this is all hypothetical because my kids and I aren't eligible for UK passports until Sept of 2005...and the first place I'm thinking of visiting on it is Cuba!
The cardinal principle of holding dual nationality is that the dual national is subject to all the laws of both countries. So, for example, I, as a US/UK dual national, am subject to the US law requiring me as a citizen to file a tax return each year, whether I'm living and working in the US or not. This holds true whether I live in the UK or in Antarctica.
Equally, if I were to go to live in the US, I would be subject to various UK laws that apply to UK citizens wherever they are (a law banning bribery of foreign governments to get contracts, for example).
So, when you are in the US, whether you have entered as a US citizen, or a UK citizen, you are still subject to US laws. The law says that you must present your US passport when you enter the US. If a law is later passed that US citizens may not travel abroad and that all non-US citizens must be deported from the US, you'll be subject to that law too, as will your spouse and children.
There are two ways of getting around this. First, you could renounce your US citizenship. As long as you are not likely to want to live in the US as a US citizen again, that would serve your purpose. It might make for a few more questions at the border were you to travel in the US (Why did you renounce your citizenship? What's your tax status? are two examples I can think of.) but you would then be a non-US person and subject to any strictures that might be placed on your husband and children.
The second way is to gain US citizenship for your husband. This would probably involve going back to the US for a while and applying for a green card for him at the Embassy here (I don't know the exact procedure as my partner is not eligible for this so I haven't paid much attention.)
I agree that almost anything is possible, but I think that laws such as the ones you suggest would be most unlikely to be passed (even by the paranoid people currently inhabiting Washington) and even more unlikely to stand up in court.
Cheers!
Chris Hansen
http://www.hansenhome.demon.co.uk