Did not know that stat. They do not consider themselves American, but rather Mexican.
I have a friend in Texas, who is a Spanish speaker (bi-lingual), and knows a few families with DACA kids. He points to examples that he knows of individuals with STEM degrees and good jobs (he travels in a relatively affluent circle).
Some of them are worth keeping, economically. Perhaps half are underachievers or problematic, worth kicking back. I’d like to see a screening, based on merit.
Even among the meritorious segment of the DACA Mexicans though, I doubt there would be many Republican voters.