Noah Feldman, Columnist

Sanctuary Cities Are Safe, Thanks to Conservatives

Supreme Court precedent makes it unconstitutional to take away federal funding.

November 29, 2016 at 7:52 PM UTC

Noah Feldman is a Bloomberg Opinion columnist. A professor of law at Harvard University, he is author, most recently, of “To Be a Jew Today: A New Guide to God, Israel, and the Jewish People."

Some good news for immigrants.
Photographer: Joe Raedle/Getty Images

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President-elect Donald Trump says he will make “sanctuary cities” help deport immigrants by taking away their federal funding if they don’t change their policies. The good news is that he and Congress can’t do it -- not without violating the Constitution.

Two core rules of federalism preclude Trump’s idea: The federal government can’t coerce states (or cities) into action with a financial “gun to the head,” according to Supreme Court precedent developed by Chief Justice John Roberts in the 2012 Affordable Care Act case. And federal officials can’t “commandeer” state officials to do their work for them under a 1997 decision that involved gun purchases under the Brady Act.