is it possible to have a dual citizenship even if I&#39;m not a national of these countries? I am planning to apply for Italian citizenship after having lived here for three years, but I am also about to marry a US citizen. Will it be possible for me to have Italian citizenship and in the future to obtain US citizenship? The problem is that I am not a national of either of the two.
Your caveat about not being a national of either country is a bit puzzling, because your question is about acquiring the countries' nationality, which implies as a matter of course that you do not presently have either nationality. After acquiring each country's nationality, of course, you will be a national of that country, so by the time you are a dual citizen of Italy and the US, it will no longer be true that you are not a national of either country. In other words, it's analogous to asking "Will I be able to get a driver's license after I learn how to drive? The problem is that I don't have a driver's license." US law does not require you to renounce Italian citizenship if you naturalize as a US citizen. I don't know Italian law on the matter very well, but the relevant section in Wikipedia says, without citations, that naturalizing elsewhere does not cause loss of Italian citizenship. Assuming that is true, and that neither country makes any relevant changes in its nationality law, then the answer to your question is yes: you can be a dual citizen of both Italy and the United States. (In fact, you may at that point hold three or more citizenships if your current country or countries of citizenship does not or do not have laws causing you to lose citizenship when you naturalize in Italy or the US.)
Exact wording might matter here, so I looked up the law. It says "a permanent resident complies with the residency obligation with respect to a five-year period if, on each of a total of at least 730 days in that five-year period, they are physically present in Canada". Immigration and Refugee Protection Act, 28(2)(a). If you visit the Canadian side of the park, you're "physically present in Canada". It would therefore appear that this would meet the requirement. I am by no means an expert in Canadian immigration law, though.
The U.S. Constitution merely requires that you be a U.S. citizen, that you be at least 30 years of age, that you have resided nine years in the United States, and that you currently reside in the state from which you are elected, to be a U.S. Senator. The courts have held that extra-constitutional qualifications for the office may not be imposed. The Supreme Court of the United States has affirmed the historical understanding that the Constitution provides the exclusive qualifications to be a Member of Congress, and that neither a state nor Congress itself may add to or change such qualifications to federal office, absent a constitutional amendment. Powell v. McCormack, 395 U.S. 486, 522 (1969); U.S. Term Limits, Inc. v. Thornton, 514 U.S. 779, 800-801 (1995); Cook v. Gralike, 531 U.S. 510 (2001). (Source: Congressional Research Service). Therefore, a dual citizen can be a U.S. Senator under U.S. law. This said, the oath of office involved in becoming a U.S. Senator is something that would be considered a voluntary relinquishment of the individual's non-U.S. citizenship by many countries. Under U.S. law: [W]ith the exception of formal denaturalization, a United States citizen can lose his citizenship only if he voluntarily performs an act that is “in derogation of allegiance to the United States,” 42 Op. Att’y Gen. 397, 400 (1969), and that was committed with the intent to relinquish United States citizenship. See Vance v. Terrazas, 444 U.S. 252, 261 (1980). “[A]n act which does not reasonably manifest an individual’s transfer or abandonment of allegiance to the United States cannot be made a basis for expatriation.” 42 Op. Att’y. Gen. at 400. Although the Supreme Court has definitively held that Congress cannot provide by statute for involuntary expatriations, it has upheld Congress’ authority to prescribe by statute the types of acts that Congress considers to be generally “highly persuasive evidence . . . of a purpose to abandon citizenship.” See Nishikawa v. Dulles, 356 U.S. at 139; Vance v. Terrazas, 444 U.S. at 261, 265. These acts are set forth in § 349 of the Immigration and Nationality Act, 8 U.S.C. § 1481. One of these specified acts is a “formal renunciation of nationality before a diplomatic or consular officer of the United States in a foreign state.” 8 U.S.C. § 1481(a)(6). Other specified acts include: obtaining naturalization in a foreign state; taking an oath or making an affirmation or other formal declaration of allegiance to a foreign state; serving in the armed forces of a foreign state; serving in an office or employment under the government of a foreign state that requires assumption of the nationality of that state or a declaration of allegiance to that state; or committing an act of treason against the United States. Id. § 1481(a)(l)-(4), (7). Thus, under U.S. law, the oath of office required to serve as a U.S. Senator if made to a state other than the United States (e.g. in connection with being sworn in as a Mexican Senator), would end the dual citizenship of the person being sworn in to public office, and make them only a citizen of the country in which that elected official held public office (in this example, of Mexico). Many countries cause dual citizenship to be relinquished under similar circumstances.
You are subject to the laws of the jurisdiction that you are in. However, some of the laws of the jurisdiction you reside in or are a citizen of have extra-territorial applicability, so you have to comply with those laws too.
Any country can certainly decide who it should grant citizenship status to. There is no international rule that I know of requiring that the recipient be currently a resident of the country granting citizenship. Any country may issue passports to its citizens.
An individual obtains due process rights upon entering into the United States. For a recent write-up on this question, see this piece at Reason. The people Trump is talking about generally aren't being denied admission at an established, legal border crossing; they're coming across wherever they can get through, and only being discovered by federal agents thereafter. Because they're already in the United States, they have due process rights. As for cross-border interactions with ICE or CBP, the extent of due process protections is still an open question. SCOTUS took it up last year, but it kicked the case back to a lower court rather than deciding it.
Skyborn are a known phenomenon. Country Citizenship? Generally, the kid automatically gets citizenship from his mom (and father) through bloodline, so our skyborn on that plane is likely that citizenship(s). There are cases that can't grant a citizenship that way (among them: Vatican is only granted ex officio) The sky is also treated as an extension of the land below. If the country you fly over has Jus Soli, it grants citizenship to the baby born above it. The USA has Jus Soli in its 14th amendment, our skyborn baby has dual citizenship to whatever country the mom is from. And in case the plane is over unclaimed water - think a nonstop flight Vancouver-Tokyo by Lufthansa - maritime law applies: The airplane is registered somewhere and treated as territory of that land while over international water. Lufthansa is in Germany, so the kid is, on paper, born in Berlin Germany (as that is what Germany prescribes for air- or seaborn). Germany does not use the unrestricted jus soli but the first test is the bloodline to determine what's the kid's citizenship is, unless the kid would have no citizenship through bloodline. So, if any one parent is German, the child is German. jus soli applies mostly to children of someone who has a permanent residence permit for at least 3 years and has been in Germany for the last 8 years: then the kid is (also) German, even if that grants dual citizenship - till the child is 23 and has to choose one of its citizenships. However, if all known parents are stateless or can't grant the kid citizenship through their bloodline (Yes, that happens!), then the kid born on this international flight has the right to become a German citizen - but some rules still apply. Which City/District/State is responsible? Now, which state's office is responsible? That is even more tricky. Technically, OP's kid that is born in Nebraskan Airspace is a Nebraskan, so it should be a Nebraskan birth-certificate. But the general rule in maritime practice would be to file the papers in the next port the ship lands, that would be Maryland if applied to planes. For a german registered ship or plane (my Lufthansa example), the responsible municipality would be Berlin, unless another municipality is responsible. US State citizenship? And then, I thank hszmv for this US Addendum: It should be pointed out that in the U.S. state citizenship is based on primary residency and can be changed over time. I've personally been a Maryland citizen, a Florida Citizen, and a Maryland citizen for a second time in my life. Usually state citizenship denotes exclusively where your vote is cast. No state can restrict a U.S. citizen from taking up residence in that state per constitution. So the Nebraska vs. MD distinction is academic only... the kid could move to California for the rest of his life without much fanfare. So, as a result, let's assume the parents of the Skyborn actually live in New York. Then te kid gets registered as a New York Citizen, his place of birth is &quot;Above Nebraska&quot; (or the state's equivalent rule) on OP's hypothetical. The couple on the Lufthansa flight could ask to have Berlin (Germany) written into the record, as that is where the interior of all Lufthansa planes is to be considered under the law over international waters.
You don't need to "report" it to anyone in the US or do anything else. The US doesn't have any national registry of marriage. Any marriage or divorce conducted anywhere in the world is automatically recognized anywhere in the US (with some exceptions like polygamous marriages); the same is true in many other countries. How does the U.S. find out, for tax or insurance purposes? Obviously there's a little box that says [] Married but how would they know if I lied if I'm not registered in the United States? They don't, and don't need to. (The same is true for marriages in the US -- they don't directly "know".) You are required to use an appropriate filing status for your marriage status at the end of the year for each year's tax returns. If you don't, you are committing fraud. There are lots of things that you can intentionally lie about on tax returns, and they may not immediately "find out"; but when they do, you are in big trouble. Am I legally required to report it when I return? No. Would the Canadian/provincial government inform the U.S./state government? No.