Two issues.
1. Congress could stop alot of this nonsense by legislation that denies citizenship by birth to those born to parents who are not U.S. citizens.
2. The U.S. Supremes found that magical right in the Constitution for illegal kids to get a 'free' public school education. Time to revisit that issue with a more conservative court.
I am not sure that a "conservative" court or Congress will act. They get too many campaign dollars from those interested in cheap labor, Anazingly, this includes the labor unions, because the most powerful ones are the public employees unions.
Here's how I think it works: the District gets ADA money for each student who attends. They do not care if they are legal or illegal. They certainly aren't going to check on immigration status and then turn away money. And frankly, I don't want unschooled kids who do live here hanging out NOT able to go to school.
The parents don't speak English. But my great-grandmother never spoke English. Her kids all learned English in school, all graduated from High School, in the 1890s.
So ... the problem is, then ... the unions, I think. And of course that teacher and his ilk who sit and read a book to their students instead of working. The Lazy Loafers, I like to call them.