You can get details on the Orange Turd's plans to persecute immigrants, legal and otherwise, from a number of news sources, so I won't elaborate them here. Suffice it to say that he wants to take away due process from ALL immigrants, migrants, etc. seeking temporary or permanent residence within the US. He repeatedly said that he wants ZERO immigration AND to expel all persons of foreign birth, even if they're here under lawful permits.
History has shown what happens to a nation when it turns radically xenophobic. Its economy stagnates.