In the early days of the Republic, during the administration of John Adams (1797-1801), the Federalist Party majority in Congress enacted the Alien and Sedition Acts of 1798, an action against French nationals who had migrated to America during the French Revolution.
President Adams signed the legislation’s four laws, which violated the recent enactment of the Bill of Rights in 1791, and the “Quasi War”, undeclared naval war against France went on from 1798-1800, until the coming to power of Napoleon Bonaparte, led to an agreement to end the undeclared war.
The controversy over the Alien and Sedition Acts led to the defeat of John Adams by Thomas Jefferson in the Presidential Election of 1800, and the repeal of three of the four laws passed in 1798 was the result, but what remained was the Alien Enemies Act.
The law was used during the War of 1812 against Great Britain, under President James Madison, but after that, ignored for a full century.
That law was utilized by Woodrow Wilson in World War I, against nationals of German and other nationals of enemy nations during that war.
And then, again, that law was utilized to justify internment of Japanese nationals after the Pearl Harbor attack that brought America into World War II.
In 1988, President Ronald Reagan signed legislation that led to an apology to survivors of the Japanese internment, and financial compensation to those individuals.
But the law remained in the background, and now, eighty years after World War II, Donald Trump has utilized it as a method and justification to accelerate the deportation of millions of immigrants. Trump is first starting with Venezuelan migrants who have been involved in crimes, but also promoting the removal of hundreds of thousands of Venezuelan refugees who had been given Temporary Protected Status by President Joe Biden, and face potential threats if they are forcibly returned to Venezuela, where they faced likely imprisonment or death.
And invocation of the Alien Enemies Act will be used as justification for deportation of millions of other undocumented immigrants, which have come to America to escape persecution and violence in their homeland, and now face a threatening future to their health and safety.
This is perceived as a massive abuse of power, and as the most nativist action by the US government in modern American history!
An update, that despite a federal judge ordering to stop removal of some 250 undocumented Venezuelan immigrants and to return those on the way to El Salvador, which has agreed to accept them, that the Trump Administration has ignored the restraining order, and such immigrants have arrived in El Salvador.