Target the funding.
When they inevitably accuse you of harming children for a political reason, remind them that if schools are in such dire shape, those importing illegals are the ones harming children.
It's like Ann Coulter said. If this is such a racist, sexist, homophobic, terrible country, then let's do the illegals a favor and keep them out. We wouldn't want to be cruel by bringing them to such a crummy country.