Isn't this just like putting GPS on everyone's cars without a warrant and then giving access to authorities to that information? Didn't the Supreme Court decide that's unconstitutional?
The supreme court decided it was unconstitutional when does as an unsupervised action of the executive branch. The action is in principle legal, but requires a warrant. The warrant is a check vs. a different branch of government. This is a law passed by the legislature, so that analysis doesn't hold. As long as the executive branch stays inside the boundaries set by the law, the checks are in place.
That doesn't mean that it's clearly constitutional either, just that the basis for the court decision isn't applicable here.
