Must we wait for the Feds to take action? That might be a long wait depending on who's in power. Can't someone bring suit now against a sanctuary city based on this ruling?
A private citizen would run into the same legal problem that Arizona ran into at the Supreme Court. It’s a federal, not state, local or private issue. I would bet that a Federal Court would toss out such a suit on the basis that the private citizen does not have standing to assert the claim.
It is still a political issue. The fact that a branch of government is not performing its job function does not grant any other branch the legal authority to step in and fill that function. It is a political question up to the electorate to hold elected representatives accountable for their malfeasance.
This site is about upholding the principles of the United States as a Constitutional Republic. Well, that is how a Constitutional Republic is supposed to work. Forcing it to do anything else means it is no longer a Constitutional Republic. While the United States probably is no longer a Constitutional Republic already, it’s not logically justifiable to make it something other than a Constitutional Republic that we want as opposed to what the left wants.