Articles like this have no useful meaning.
They can stop the vehicles.
They can "seize" the illegals.
BUT...
They're just going to be arrested, processed, and released.
In other words, their "objective" has been achieved.
It doesn't matter if the Border Patrol apprehends 30 "migrants", 300, 3,000, or 30,000.
They're all "here" now, and free.
It's like Jim Morrison of The Doors sang in "The End" 'way back in 1967:
"The West is the best
GET HERE...
... and we'll do the rest."
All an illegal needs to do is to "get here".
Then "we" do "the rest"...