Extra funding has been provided to Abbott districts in New Jersey for decades, and these largely black districts are better funded than the districts in the wealthiest (and whitest) parts of the state. In spite of this, the performance gap has increased between Abbott and non-Abbott districts.

Also I don't think the word "explicitly" (or "racist," or both) means what you think it means.

https://en.m.wikipedia.org/wiki/Abbott_district