The Volokh Conspiracy
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Revised and Updated Version of My Article "Immigration is Not Invasion"
It is now available on SSRN. The revision adds additional evidence, and takes account of various recent events, including Trump's military intervention in Venezuela.

A revised and updated version of my article "Immigration is Not Invasion" now up on SSRN and can be downloaded for free. It adds more historical evidence on the meaning of "invasion" in the Constitution and the Alien Enemies Act. It also addresses recent events, such as Trump's declaration that fentanyl is a WMD, and his military intervention in Venezuela to seize that country's dictator, Nicolas Maduro. None of these actions convert illegal migration or drug smuggling into an "invasion" of the US, and many of them are themselves illegal. These actions are covered in Part III of the article.
Law journal editors may be interested to know that I will be submitting this article for publication in the spring semester submission cycle.
Here is the updated abstract:
In recent years, state governments and the second Trump Administration have increasingly advanced the argument that illegal migration and cross-border drug-smuggling qualify as "invasion" under the Constitution, and the Alien Enemies Act of 1798 (AEA). If these arguments are accepted by courts, or if they rule the issue is committed to the unreviewable discretion of the executive, the consequences will be dire. Such an outcome would pose a grave threat to the civil liberties of both immigrants and US citizens. It would also enable state governments to initiate war without federal authorization. This article makes the first comprehensive case against claims that illegal migration and drug smuggling qualify as "invasion." As James Madison explained in 1800, "Invasion is an operation of war." Illegal migration and drug smuggling do not qualify.
Part I summarizes the history of the "invasion" debate and currently ongoing litigation over it. Part II explains why the broad interpretation of "invasion" is manifestly wrong under the text and original meaning of the Constitution. The concept does not include illegal migration or drug smuggling. This conclusion is supported by the constitutional text, extensive evidence from the Constitutional Convention and the ratification process, and references to "invasion" in the Federalist Papers.
In Part III, I consider the meaning of "invasion" in the Alien Enemies Act of 1798. The text and public meaning indicate it is essentially the same as that in the Constitution. Under the Act, an invasion requires a military attack. This reality is not changed by the fact that many Americans die as a result of overdosing on illegal drugs, or by recent US military attacks on suspected drug smugglers in international waters. The more recent US military intervention in Venezuela also cannot be used to justify invocation of the AEA.
Part IV outlines the dire implications of the broad view of invasion. State governments would have the power to wage war in response to undocumented migration and smuggling, even if such warfare were not authorized by Congress. This would be a major undermining of Congress' power to declare war and threatens to involve the United States in warfare at the behest of a single state government. Even worse, the broad view would also effectively give the federal government the power to suspend the writ of habeas corpus at any time. These dangerous implications strengthen the originalist case against a broad definition of "invasion." They also cut against the broad definition from the standpoint of various living constitution theories of interpretation.
Finally, Part V explains why courts should not defer to the president or to state governments on either the meaning of "invasion" or the factual issue of whether an "invasion" – properly defined – has actually occurred.
The earlier version of this article got the coveted "Highly Recommended" rating from Prof. Larry Solum (University of Virginia) at his Legal Theory Blog.
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Ilya is an Open Borders extremist
Kleppe, from what Native American tribe are you descended?
Libtoids: immigration destroyed the native Americans. We should totally do it again!
Immigration did not destroy anyone. Is this rabid xenophobia on the right based on the reasoning, "When we were in the majority we did terrible things to the minority, so we assume that if we become the minority the majority will do terrible things to us"?
And Somin is one of the invaders.
Good for Ilya. Open borders is better than the crap we have now.
More detached from reality commentary from Somin. Illegal immigration is invasion. Legal immigration is not. With Ilya's inability to make basic distinctions you have to wonder if his wife trusts him to buy groceries.
I still wonder what Ilya would say if there were a significant number if illegal alien law professors -- to the point where LEGAL ones started losing their jobs.
No sort of immigration is invasion. With your inability to grasp the English language you have to wonder if your mother still has to tie your shoelaces for you.
Coming soon to a Dollar Tree near you.
$1.25 tree, soon to go up.
Thank you, Brandon…
Thanks for the "Mostly law professors | Sometimes contrarian | Often libertarian | Always independent" content.
So does the US military action in Venezuela negate your prior argument that denies any justification for treating them as enemy aliens? Because I've been seeing people insisting this was an act of war by the United States. Because if a state of war exists, declared or otherwise...
(Yes I'm mostly trolling here, but then that is most of what Somin does, pushing his unsupported crackpot constitutional theories as normative, that the Constitution does not give Congress plenary power over immigration and the ability to restrict it. Somin will argue for his position no matter how the facts might change underneath him.)
The AEA expressly says "declared war," not "state of war." So… no. POTUS can't manufacture an enemy by unilateral action.
Not at all. There is no declared war, invasion of the US, or predatory incursion against the US.
The text of the Alien Enemies Act does not cover the case where a President unilaterally invades a foreign country with no Congressional declaration of war. Such an event does not trigger any of the Act’s provisions. The Act remains as irrelevant today as it was before.
And for good reason. The Framers, many of whom were still in Congress when the Act was passed, were very concerned about too great a concentration of power into the hands of the President. And the power to round up a group of people and imprison or expel is a truly extraordinary and dangerous power.
Hitler provided legal cover for the Holocaust by declaring Jews, who had heen stripped of citizenship by the Nuremburg Laws in 1935, enemy aliens when war broke out in 1939. He then used existing powers similar to our Alien Enemies Act to first put them in ghettos and then “deport” them to death camps. Both Jews’ legal status as enemy aliens and the established legality of interning and deporting enemy aliens reduced potential for questioning his actions.
The Holocaust experience, and the use of law as a cover for it, is an excellent reason why the Alien EnemiesAct should be interpreted narrowly. It clearly illustrates the potentially severe consequences of giving a President unfettered power to unilaterally proclaim groups of people, on his mere personal say-so, enemies of this country that he is entitled to intern or deport at will.
So we all have to accept millions of invaders because Hitler did some nasty things in 1939.
Hey, Schlafly finally admits Hitler wasn't perfect; I suppose that's some small progress.
The Constitution gives Congress primary responsibility over immigration.
That same Constitution prohibits the President from going out on the streets and simply shooting anyone he decides is a criminal. You could equally ask if that means we just have to put up with millions of criminals.
We don’t necessarily have to put up with criminals. But that particular way of getting rid of them is closed by the constitution - because the Framers were concerned about past leaders who simply decided people were criminals and executed them on the spot. So yes, hecause of past that avenue is simply closed.
This situation is quite similar.
One difference is that with immigrants, the President can go to Congress and ask it to give him more power.
Will mention you raised something called a “false dichotomy.” It’s either my way or the highway, Trump does what he wants or nothing at all gets done. The reason a “false dichotomy” is called a “logical fallacy” - a polite term for bullshit - is that there are just about always more than two alternatives out there. It’s only because people’s minds are limited that they tend to keep only two alternatives in their head at a time.
Passing something in Congress is nearly impossible. The President has to protect the nation, while waiting for Congress.
If Congress doesn’t want to pass something, that’s its right.
You speak the language of dictators. An American President has no right or power to “protect the nation.” It’s frankly none of his damn business. His business is to “faithfully execute the laws.” The laws are made by Congress. It is Congress’s job, not the President’s, to protect the nation. The President just carries out its directives.
If Congress won’t act, then elect people to it who will. The President has no business usurping its power.
By the way, a far more obscure single incident gave rise to several constitutional provisions. When several members of Bishop Fisher’s household took ill after eating some porridge, his cook, Richard Roose, was attainted with poisoning by act of Parliament (Parliament simply passed a law declaring him guilty, with no trial) and executed by order of Henry VIII by the new (in England) punishment of being boiled alive. The prohibitions against bills of attainder and cruel and unusual punishment both stem from this incident.
No predatory incursions?
MN widespread fraud from the Somali community is not predatory?
So what is an 'invasive species'?
Should the Native Americans be accepting - even happy - that they were displaced and decimated by unrestricted immigration?
Or was it bad when it happened *then*?
They were not displaced or decimated by immigration. They were displaced and decimated by war (and disease).
I agree that immigration has never been regarded as invasion for two main reasons.
First, it is dealt with in a completely separate portion of the Constitution, the Importation and Migration Clause. Second, it has never been so regarded throughout our history, and there have been multiple times where Congress has thought thia country inundated with immigrants.
Congress has broad powers to control immigration. I believe it could, if if wanted to, authorize use of the military to patrol the borders to prevent it. However, if it wants to do this, it must say so clearly. The Administration is attempting to give established language completely new and unprecedented meaning in order to achieve a desired policy outcome. This is a classic example of putting an elephant in a mousehole.
david nieporent is the kind of guy who thinks the 14th Amendment grants a gay man a constitutional right to put his erect penis into another man's cornhole and thrust it in and out, spraying a load of aids fluids into the other guy's prostate.
who cares what he thinks about immigration?
Always an honor to be graced by the Gayest Man on the Internet.
Are you being homophobic?