That’s right. The Trump Admin can’t deport 800,000 youngsters, many of whom left Mexico and other countries at such a young age that they don’t remember living there. The polling is strongly against deportation of these kids among people in both parties. The media coverage of a mass deportation would be awful and would finish Trump politically—he’s be down to a 20% approval rating, at most.
But politically, the Trump Admin doesn’t have to do much more than renew their work permits and not deport these kids. They don’t need to legislate a path to citizenship, and they certainly can stop chain migration of more relatives in other countries moving into the US. They won’t deport the relatives who are already here, because then they’d look heartless for breaking up families. But with a few exceptions, such as parents, they can stop more relatives from migrating into the US. Cousins, uncles, and grandparents are out of luck, especially considering the kids won’t be citizens.
This could end up in a standoff in congress, with democrats and RINOs insisting on a special legislated path to citizenship and conservatives standing firm for no special treatment on a path to citizenship (except maybe for youngsters serving in the US military). This could end in a standoff for a long time, with no legislation passed, and the Trump Admin just renewing their work permits so they can work, and not deporting these youngsters.