The complaint encapsulated by the above title corresponds to the Republican Party's attitude toward "illegals" at present, and is now being tied to the current dispute over whether the U.S. Census should include the counting of non-citizens. Even when the critic of the current process concedes that "illegals" won't be allowed to vote--a concession which, of course, is quite unlikely given who these particular critics are--based on the (unassailable) point that counting such individuals in the Census has effects on the distribution of Congressional and Electoral College seats, they are likely continue to maintain their objection to counting "illegals" in the Census.
Are such effects inappropriate, akin to letting a poacher dominate use of the gym eliptical (every freaking day!?) The short response is that countries are not clubs. If a fitness establishment has rules requiring the payment of fees, then it is quite reasonable to insist that nobody should be getting club benefits without paying up. But territories are importantly different: if they are to be considered authentically democratic, they must have authentically democratic rules and rule-making in place. The "benefits of citizenship" should not be thought to extend to voting rights in any real democracy, because the latter are required to ground citizenship there. That is, while votes should be taken to be the appropriate way to make almost every public policy--those that constitute and constrain democracy itself are exceptions to that rule.
Without that crucial deviation, there could be no good objection to calling what Putin is attempting in Ukraine or Netanyahu would like to achieve in Gaza examples of forceful democritization of deviant territories. In other words, when a sufficiently powerful alien country takes over a territory, they can set forth a list of whose preferences are to be counted there, and so long as they hold events that look something like elections occasionally, they can describe what they have done as being consistent with "democratic nation building."
Naturally, some individual or country might have the power to take this or that land (even planet!) by force; the point is that the immediate result of such conquest can never be correctly called the creation of a democratic polity unless every competent inhabitant there gets to vote on all matters of national policy (again excluding axiomatic democratic principles).
The appropriate way to prevent an entire world of might makes right among those nations calling themselves "democracies" is to insist that once people have been living in a territory for a reasonable period of time--say a year--they must have an absolutely inviolable right to equal involvement in the determination of (nearly all) nearly all the public rules there.
The equal effective electoral power of all competent residents# should extend even to policies involving immigration, emigration, and citizenship. The crucial exception, however, is that such policies (even those regarding citizenship or "wall-building") cannot extend to voting rights.
In other words, a group of people can make a club and put whatever rules in place for it that they want. But a group of conquerors can't just declare ownership of a populated area and imagine that it will be a democracy whoever they announce has the right to vote there.
Getting back to our original question, this means that the fight regarding which individuals should be included in U.S. Census tallies must be determined in accordance with at least something like the Democratic Party's preferences, because if all competent residents--regardless of their "legal status"--aren't counted for the purpose of determining, e.g., the appropriate number of Congresspersons for each state, the U.S. cannot reasonably assert the right to be included among the democratic republics of the world.##
Other purposes of the Census, like those involving the distribution of Federal funds, aren't in the same category. The question of whether only citizens should be counted for the purpose of welfare determinations is something that, arguably SHOULD be subject to majority vote. The point is that all the non-temporary residents must be allowed to vote on them if any question of that sort is put to "the people."
Authentic democracy absolutely requires that every long-term resident (even incarcerated felons) be treated equally with respect to the weights given their preferences, and it doesn't matter in the slightest how the majority of those who are currently eligible to vote in America would prefer this dispute to be resolved. No territory can remain a democratic polity if it allows for the undermining of basic democratic principles--even by its voters. Not only would a majority be insufficient to legitimately exclude non-citizens from being counted in any Census used to determine numbers of representatives, unanimous consent wouldn't do the trick either.
This isn't actually that complicated if one thinks about what is necessary to make something a democracy and remembers that the democratic axioms landed upon cannot be abandoned without forsaking democracy itself.
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#For a brief discussion of "competence," see my blog entry for 9/14/23 and the one for 7/18/25. For discussions of "residence" and "inhabitancy, see my book, especially Chapters 5 and 6.
##Admittedly, whether the US should now be (or should have ever been) included either way is a good question...but never mind that vexing matter for the present.