Are Two People Considered a Single Person When Married In the United States of America is a married couple, regardless of sex, considered to be a single person by the government? If so, in what situations does the government not view them as a single person.
The modern rule is that individuals in a married couple are almost never considered a single person (ownership of real property in a tenancy by entireties in a few states mostly in the Northeast, is a narrow and rare exception). Historically, considering a married man and woman to be a single person (a legal doctrine called coverture) was common place in the common law, but almost all such rules have been superseded. Lots of the relevant law and legal history is considered in the answer to this question at Law.SE.
In the US at least, discrimination is legal (and sometimes even required) unless it is discrimination against specific, protected characteristics, and even then it is sometimes allowable if it is "necessary". Income, whether of an individual or that individual's family, is not in any list of protected characteristics. As such, discrimination upon it is fully legal.
The legal term for premarital sex, as a crime, is fornication. I found a paper that gives an extensive and well-referenced history and analysis of such laws: Sweeny, JoAnne. Undead Statutes: The Rise, Fall and Continuing Uses of Adultery and Fornication Criminal Laws. Loyola University Chicago Law Journal 46 (2014), 127&ndash;173. http://www.luc.edu/media/lucedu/law/students/publications/llj/pdfs/vol46/Sweeny.pdf Sweeny finds that many states (or even most) had such laws. As of 2014, six states still do: Idaho, Utah, North Dakota, Illinois, Mississippi and South Carolina (see map on page 156 of the above paper). However, they are likely unconstitutional under Lawrence v. Texas. Virginia and North Carolina also have laws that have already been found unconstitutional, but have not been repealed.
As user6726 notes in an answer, the page you link to derives from 26 USC 7701. However, it does not reproduce the text accurately. There, "United States person" is defined at section 7701(a)(30), and it notably lacks anything corresponding to "any other person that is not a foreign person." It's possible that that language is motivated by some court decision, but it's also possible that someone just added it for the sake of symmetry with the definition of "foreign person" without thinking about the logical paradox that it might create. Looking at section 7701, I don't see any explicit mention of US non-citizen nationals. It appears that such a person who does not live in one of the 50 states or the District of Columbia falls under the definition of nonresident alien at 7701(b)(1)(B) even though such a person is explicitly not an alien under the Immigration and Nationality Act. I do not see any regulations correcting this oversight, but I suppose that in practice such people are indeed treated as US citizens. I don't know enough about the classification of nonhuman legal persons as foreign or domestic to have any ideas about whether there are similar ambiguities there.
Article 41.3.3 of the 1937 Irish Constitution said: No person whose marriage has been dissolved under the civil law of any other State but is a subsisting valid marriage under the law for the time being in force within the jurisdiction of the Government and Parliament established by this Constitution shall be capable of contracting a valid marriage within that jurisdiction during the lifetime of the other party to the marriage so dissolved. Until this section was changed by the 2019 amendment. I can find no source to show how &quot;but is a subsisting valid marriage under the law&quot; was interpreted, but it seems that a person divorced in or prior to 1940 under US law would not have been permitted to marry in Ireland after 1937 until 2019 under this provision. It should be noted that although Finnegans Wake by James Joyce was published in full in 1939, much of it had been written and published in sections by 1926. It is not at all clear just when it is set. In the 1920s, the constitutional provision quoted above was not yet in effect.
The United States would be one such country. I'm sure it is not the only one. In the case of countries with constitutional courts there is basically no one to second guess their interpretations which is also true when the apex court in a country provides an opinion. Since no one can overrule many of these courts, they are allowed to do what they want.
Your children may have automatically become US citizens at birth, depending on how long their mother lived in the US before they were born. US law says that any child born abroad to an unmarried US citizen mother is automatically a US citizen, as long as their mother had lived in the US continuously for at least one year before the child was born. There is a clear discussion of the legal requirements in Chapter 3 of the USICS Policy Manual: US Citizens at Birth . Your specific situation is covered by § C.2: Child of a US Citizen Mother (also at the bottom of the page!). (The underlying statute, §1409 of the Immigration and Nationality Act, is here. Like most of the INA, §1409 is not reader friendly.)
It may be discrimination; not all discrimination is illegal. Details vary by jurisdiction, for example discrimination on the following bases is illegal in Australia: race colour sex sexual preference age physical or mental disability marital status family or carer’s responsibilities pregnancy religion political opinion national extraction social origin Tobacco use or non-use doesn't make the list. That's the legal position; if you want advice on how to handle the workplace stuff post your question on the Workplace Stack Exchange.