Translation of "Crackdown" in French

You can't tell that there's been an immigration crackdown here, but there has.

Difficile de croire qu'il y a des restrictions migratoires en place ici, mais c'est le cas.

But this crackdown was never meant to keep Central Americans out of Mexico, it was

Mais ces restrictions n'ont jamais eu pour but de bloquer les Centraméricains hors du Mexique

But perhaps the most egregious offence of the Mexican state in this crackdown, comes down to

Mais peut-être l'infraction la plus flagrante de l'état Mexicain dans cette crise