Harris has supported giving immigrants who are in the country illegally access to health coverage through her 2019 Medicare for All plan, but she hasn’t said it would be free for them or that it would be funded by taxpayers.
https://www.politifact.com/factchecks/2024/jul/31/donald-trump/gop-charge-that-kamala-harris-backed-taxpayer-fund/
Astonishing given there aren't very many people here illegally to have a policy position on this.