[JumpCrisscross]

> probably just means it's illegal for local governments to use cloud based cameras in Illinois

Probably not. A state can regulate how its own resources are used. It can't block a federal warrant.

[kloop]

> It can't block a federal warrant.

Exactly. If they all submit to federal warrants, and the state has a law effectively against that, then it becomes illegal to use the cameras.

[vkou]

It can't stop a warrant but it can make it illegal to gather and retain data in a way that can be later retrieved by a warrant.