Many poor children are on Medicaid. If you are born in the US to an undocumented person then you are a citizen and eligible for Medicaid. So they can use this info to find the undocumented parents of these kids and deport and disappear them. Then the kids have to chose between staying with their family or leaving the only country that have ever known.

Oh good, so they are raiding databases that predominatly contain personal information on people they aren't looking for.

From TFA:

> Medicaid, state and federally government-funded health care coverage for the country’s poorest, is largely available only to some non-citizens, including refugees and asylum seekers, survivors of human trafficking, and permanent residents. Some states, like New York, provide Medicaid coverage for children and pregnant people, regardless of their immigration status. States report their Medicaid expenditures and data to the federal government, which reimburses them for some of the costs.

The Trump admin is aggressively deporting refugees and asylum seekers who entered legally.

California provides full coverage to undocumented migrants. This is who the administration is targeting.

As a related aside, Federally-funded California clinics are about to start requiring proof of citizenship. This is causing a panic.

Also, due to the massive cost of providing care to undocumented migrants, Newsom is about to freeze all registrations for Medi-Cal (so the message is get in now before the gates close). He's also proposing charging undocumented migrants a modest premium.

States can have supplements for non-citizens that don't use federal dollars and several do.

It’s not all state dollars though. There’s a Medicaid match for ACA expansion populations. The OBBB reduces that match by 10% for states that expanded the population to include unauthorized immigrants. In Oregon, to maintain that program Oregonians are going to have to pony up hundreds of millions more per year. Much of the country is fine with that.