You left before the election, and you left for a specific reason. I'm not advocating (I hope) that America should be a hermetically sealed country, simply that the going line on my flist is "I'm so leaving this country." or "I"m moving to Canada," or whatever, and that seems like such an awful viewpoint to me.
(In other words, I understand fleeing persecution, I support taking care of oneself, ones friends and one's family, but I don't understand expressing one's disgust by proposing leaving the country without trying to do something about it first.)
Dual citizenship would be a pretty big deal, and awesome -- are you and Marco that serious about staying in London?