Much more than that! It reads:
> The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
Seizure includes, for the sake of example, physical violence and, more specifically, shooting people in the head.
Politics is a fickle world -- being brazen by breaking laws is a risky business. You might be in charge now, but are you sure your people will always be in charge?
Further, even if you have proof of citizenship, what makes you think you'll be asked for it, rather than just being shoved into an SUV? There have been numerous citizens that were detained:
* https://www.propublica.org/article/immigration-dhs-american-...
And being detained may be for the fortunate case: many US citizens have been deported. Without trial. With an opportunity to show evidence that they are in fact citizens.
This is why protecting due process for non-citizens, illegal or otherwise, is important: if there is no due process, then the government can simply claim you are not one, and ship you off to who knows where.
At this rate, America is going follow suit and be just as worried about keeping people IN the country as it is keeping people OUT.
The US as it stands right exhibits quite a few hallmarks of fascism rather socialism: amalgamation of the capital and the state, marginalization of minorities, an extreme abuse of power, extreme nationalism. One of the tenets of socialism is that the worker class has no state, that it can only work if the workers of all nations unite, that's the exact opposite of nationalism.
the only common thing I can think of between the soviet flavor of socialism and Trump's administration is that both are authoritarian.
In a lot of ways we are tangibly shifting to a soviet style centrally planned economy, just without all of the welfare (which, to be fair, the actual soviet economies were bad at providing).