It is also going to drop soon. When immigrants, illegal or not, are forcibly removed, you don’t only remove the low-level jobs required to keep e.g. farms/factories sustainable (general US populace is unlikely to pick up this kind of low-education/low-wage jobs), which forces these companies to close. On the other hand, fewer people in town also means lower spending power, which means that fewer (e.g. food) businesses are sustainable, and this again leads to the closure of companies. The increase number of companies closing will also mean greater unemployment.